Sustainability

CU Boulder commits to green chemistry

Rachel Sauer — Tue, 04 Nov 2025 18:47:17 +0000

CU Boulder commits to green chemistry Rachel Sauer Tue, 11/04/2025 - 11:47

Rachel Sauer

In May, campus leaders signed the Green Chemistry Commitment to practice and teach sustainable chemistry—an effort being encouraged and advanced by students

For much of the history of chemistry, the science was done how it was done—with fleeting or no thought given to things like lab energy consumption or the environmental persistence of toxic chemicals used in experiments. Those things were simply considered the wages of scientific progress.

As early as the 1940s, however, some chemists began asking if there were better, less hazardous, less environmentally damaging ways to do the science. By the 1990s, chemists Paul Anastas and John Warner had given a name to this new approach: green chemistry. In their 1998 book Green Chemistry: Theory and Practice, they detailed the 12 principles of green chemistry, which include preventing waste rather than trying to treat it or clean it up after the fact and designing chemical products to preserve efficacy of function while reducing toxicity.

Since that time, green chemistry has become a movement as universities and labs around the world evolve the practice and teaching of chemistry to reduce its impact on environmental and human health and safety.

In May, CU Boulder Chancellor Justin Schwarts and Department of Chemistry Chair Wei Zhang signed the Green Chemistry Commitment, not only committing CU Boulder to green chemistry in practice and principle but joining a worldwide network of universities working to expand the community of green chemists and affect lasting change in chemistry education.

The University of Colorado Boulder has been very involved in the green chemistry movement, and in May Chancellor Justin Schwartz and then-Department of Chemistry Chair Wei Zhang signed the Green Chemistry Commitment, not only committing CU Boulder to green chemistry in practice and principle, but joining a worldwide network of universities working to expand the community of green chemists and affect lasting change in chemistry education.

“Signing (the Green Chemistry Commitment) is an important step toward integrating green chemistry into curriculum, theory, toxicology and lab applications,” says Forrest Yegge, chair of the Green Chemistry CU Student Government (CUSG) Environmental Board subcommittee and a junior studying philosophy and ecology and evolutionary biology.

“Social justice-wise, I think it’s our responsibility to be more aware of the effects we are having on the environment,” adds Jules Immonen, a first-year student studying chemistry who serves as secretary of the CUSG Environmental Board. “Obviously, sustainability is something I’m passionate about, but even people who aren’t should be able to learn how to incorporate these practices in an easy way.”

Doing better chemistry

CU Boulder’s embrace of green chemistry has been growing for years, says Kathryn Ramirez-Aguilar, CU Boulder Green Labs Program manager. The Department of Chemistry and Green Labs have been partnering on green chemistry efforts on campus, leading initiatives on everything from education opportunities to sustainable lab practices. Signing the Green Chemistry Commitment (GCC) is an important step, Ramirez-Aguilar says: “It’s a huge opportunity to involve students in designing curriculum, and it aligns with CU’s Climate Action Plan outlined last year.” In fact, she adds, members of the CUSG Environmental Board have been at the vanguard of bringing the GCC to the attention of campus leadership.

Ashley Ley, a chemistry graduate candidate and member of the Green Chemistry CUSG Environmental Board subcommittee, emphasizes that green chemistry is most importantly about practice, not just theory. “If you look at someone like Dr. (Jacquie) Richardson, she’s been making changes to methods, working toward greener methods using less harmful chemicals in the Organic Chemistry Teaching Labs. In Organic Chemistry 2, there’s a lab focused on atom economy, and one of the previous (Green Labs Chemistry) team leads worked with Dr. Richardson to incorporate acetone recycling, so now organic chemistry teaching labs only use recycled acetone for cleaning.

“These labs have also started using water recirculatory buckets because there are reflux reactions where you need a ton of water and normally it would go through the condensers and down the sink. Now it’s being recirculated, and we’re saving a lot of water. Last summer, they incorporated no-touch doors in the labs [as part of a collaborative project with Green Labs], so you can get in and out of the labs without having to take off your gloves.”

In another campuswide green chemistry application, Amrita George, a professional research assistant of many years in the Department of Integrative Physiology and volunteer lead for the Green Labs Team, is working on introducing a chemical sharing initiative in which research labs share chemicals within their research building.

Kathryn Ramirez-Aguilar (left), CU Boulder Green Labs Program manager, and Matt Wise (right), director of chemistry instruction and Department of Chemistry associate chair, give a presentation about incorporating green chemistry into the introductory chemistry curriculum. (Photo: Kathryn Ramirez-Aguilar)

“This has a lot of support from the Environmental Health and Safety group,” George says. “It aligns with one of the principles of green chemistry, which is to reduce the total amount of hazardous chemicals used and, therefore, waste created. [The initiative] allows researchers to see the chemical inventory of other labs within their building and share amongst themselves rather than ordering new stocks for each lab, which is usually what researchers do. Often these stocks sit on the shelf and expire before the lab ever uses them again.”

Ramirez-Aguilar adds that the chemical sharing initiative is also a money saver for labs by reducing purchasing—which also benefits a reduction in carbon emissions similar to a campuswide focus on reducing labs’ energy consumption, as labs are among the most energy-intensive spaces on campus.

Valentina Osorio, a chemistry graduate student and member of the Green Chemistry CUSG Environmental Board subcommittee, adds that General Chemistry teaching faculty have adapted student experiments and lab processes so that they can use drops of a chemical rather than milliliters of it. This makes a significant difference when thousands of students are conducting the experiments each year.

Performing research sustainably

While the benefits of green chemistry practice and teaching are broad and affect many communities and populations, among those most affected are students, says Ana Curry, a chemistry graduate student and member of the Green Chemistry CUSG Environmental Board subcommittee: “I’m currently working in materials chemistry, and I believe strongly that if my research is focused on sustainability, I should also be performing that research sustainably.”

Osorio notes that while her research focus is environmental chemistry, “I’m studying the impacts of air and water pollution, and while I’m not really synthesizing anything, what I’m researching is largely impacted by what humans are doing.”

Yegge adds that in addition to the environmental and social justice benefits of green chemistry, “as I prepare for grad school and I’m increasingly worried about securing funding, I think that sustainable practices on campus and in labs are crucial for resilience in academia and in research. We need to be adopting these strategies so we can keep doing the science we’re doing.”

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In May, campus leaders signed the Green Chemistry Commitment to practice and teach sustainable chemistry—an effort being encouraged and advanced by students.

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Top image: iStock

Exploring Colorado’s untapped geothermal energy potential

Rachel Sauer — Wed, 22 Oct 2025 21:00:33 +0000

Exploring Colorado’s untapped geothermal energy potential Rachel Sauer Wed, 10/22/2025 - 15:00

A major question looms over Colorado’s energy future: Why does geothermal energy—a natural renewable resource—remain virtually untapped?

Assistant Teaching Professor Shae Frydenlund of the University of Colorado Boulder Center for Asian Studies, along with Professor Bri-Mathias Hodge of the Department of Electrical, Computer & Energy Engineering, will examine the technological and social barriers that have held back geothermal development in Colorado.

Learn more about this research

A major question looms over Colorado’s energy future: Why does geothermal energy—a natural renewable resource—remain virtually untapped?

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Scaling stream restoration across Colorado

Rachel Sauer — Thu, 16 Oct 2025 19:36:49 +0000

Scaling stream restoration across Colorado Rachel Sauer Thu, 10/16/2025 - 13:36

Leah Bilski

How a unique partnership is mapping the future of riverscape restoration in the state

Colorado’s streams face mounting pressures from climate change, development, and over a century of historical degradation. While the recent passing of Senate Bill 23-270 (SB23-270) allows six categories of minor stream restoration activities to move forward exempted from water rights administration, practitioners across the state still face challenges when getting projects off the ground.

The missing piece? A comprehensive understanding of Colorado’s “restoration landscape” – who’s doing what, where, and what barriers stand in their way. This has prompted an innovative partnership between Audubon Rockies, Water for Colorado and University of Colorado Boulder students to map Colorado’s restoration landscape and identify opportunities for scaling impacts for functioning and healthy riverscapes. This work builds on Audubon’s commitment to shaping Colorado’s water future for people, birds and the habitats that we all depend on.

Leah Bilski is a graduate student in the interdisciplinary CU Boulder Masters of the Environment Graduate Program. (Photo: Leah Bilski)

A proven solution is gaining ground

Process-Based Restoration (PBR) offers a spectrum of cost-effective approaches for addressing climate and drought resilience for healthy riverscapes while furthering Colorado’s Water Plan objectives. From simple, hand-built structures using natural materials to more sophisticated engineering solutions, these techniques focus on addressing stressors and boosting natural stream processes that allow rivers to heal themselves. The passage of SB-270 created unprecedented opportunities for implementing Low-Tech Process-Based Restoration (LTPBR) across Colorado by providing legal clarity for six categories of minor stream restoration activities.

Despite these advances, critical questions remained unanswered:

Which stakeholders are leading restoration efforts, and where?
What motivates organizations to pursue stream restoration projects?
Most importantly, what barriers prevent or slow down implementation, and how has SB-270 influenced restoration practices on the ground?

CU Masters of the Environment: the perfect partner

Enter CU Boulder’s Master’s of the Environment (MENV) program. Each year, MENV students are paired with organizations addressing pressing issues in the fields of environmental policy, renewable energy, and sustainability. The students work as student consultants while simultaneously completing their master’s capstone project. The program’s focus on practical, need-driven solutions makes it an ideal partner for Audubon’s efforts to elevate stream restoration in Colorado.

Three dedicated students—Pearl McLeod, Josie Rivero and Leah Bilski—have brought fresh perspectives and social science expertise to complement Audubon Rockies’s experience as a leader in policy and project implementation for stream restoration. This collaborative approach ensures that research directly serves the needs of the restoration community while building the next generation of conservation and stream restoration professionals.

By combining Audubon’s on-the-ground experience with the students’ in-depth analysis, the partnership can reach across Colorado’s eight major water basins to engage everyone from NGOs and federal agencies to private consultants and watershed groups.

Mapping Colorado’s stream restoration efforts

The project’s primary objective is ambitious yet essential: create a comprehensive map of LTPBR projects across Colorado to identify gaps in geographic coverage and stakeholder engagement. This foundation will inform where resources and support are most needed to scale effective restoration approaches statewide.

Phase one involved launching a statewide survey to capture the broad restoration work happening across the state, while phase two will focus on in-depth case studies to understand how successful projects overcome barriers. The collaborative approach ensures findings focus on learning from both challenges and successes.

An innovative partnership between Audubon Rockies, Water for Colorado and University of Colorado Boulder students maps Colorado’s restoration landscape and identifies opportunities for scaling impacts for functioning and healthy riverscapes. (Photo: Attie Heunis/Pexels)

Early success: education efforts are paying off

Initial results reveal encouraging trends and some surprising insights. Audubon’s educational efforts regarding SB-270 have been largely successful across many regions of Colorado, with 38% of survey respondents reporting that SB-270 has benefited their stream restoration projects, while only 4% report it as a barrier.

The data shows that hydrology is the primary motivation driving most restoration projects, followed closely by wildfire recovery efforts, reflecting Colorado’s recent fire impacts and ongoing drought concerns. Restoration work is happening across all of Colorado’s major river basins, though with varying intensity, and projects consistently involve multi-partner teams applying diverse techniques to meet multiple goals simultaneously.

However, significant barriers persist, despite SB-270’s passage. Permitting challenges remain the top concern, followed by limited funding and agency coordination issues. These findings suggest that while legal clarity has improved, practitioners still need support navigating implementation processes and securing adequate resources.

The restoration community has demonstrated strong engagement and willingness to participate in research that could benefit their work. Practitioners are actively sharing knowledge and experiences, building a foundation for a deeper understanding of Colorado’s restoration landscape.

Looking ahead: supporting Colorado’s restoration community

This research will help address specific needs identified by practitioners, such as connecting isolated restoration workers with peer networks, creating guidance for navigating restoration implementation, and identifying which regions need additional technical support or funding. By identifying non-policy barriers, such as limited technician capacity and technical implementation concerns, that limit restoration work, Audubon and partners support stream restoration stakeholders in better addressing their challenges, shifting social perceptions, and ultimately restoring healthy stream habitat throughout the state. The findings can also inform potential sound policy moving forward, ensuring that future legislation builds on SB-270's success.

Through continued partnership, community engagement and support, and innovative restoration techniques, we’re working to revive Colorado’s streams for generations of birds, wildlife, and people who depend on them.

Join the effort

We are continuing to capture important data about restoration projects throughout Colorado and challenges faced through our survey. Participation helps build a complete picture of Colorado’s restoration landscape and ensures that findings reflect the full diversity of approaches and challenges across our state. Share your restoration experience through our survey (open until midnight on October 12th, 2025) and help us identify exactly what Colorado’s restoration community needs to succeed.

Leah Bilski is pursuing a master's in environmental and natural resource policy in the Masters of the Environment Graduate Program.

Essay reproduced with permission from Audubon Rockies. Read the original here.

How a unique partnership is mapping the future of riverscape restoration in the state.

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Top photo: Tricia Pionzio/Audubon Photography Awards

Competitive electricity markets help clean up the U.S. energy sector

Rachel Sauer — Mon, 28 Jul 2025 13:30:00 +0000

Competitive electricity markets help clean up the U.S. energy sector Rachel Sauer Mon, 07/28/2025 - 07:30

Sarah Kuta

CU Boulder economics researcher Daniel Kaffine finds that whole electricity markets might help reduce carbon emissions

Even though we use it every day, most of us don’t give much thought to the electricity powering our homes, schools and offices. As long as the lights come on when we flip the switch, we don’t stop to consider where our power comes from, who produces it and how.

Yet, in recent decades, electricity markets—the way power gets bought and sold—have changed dramatically in many parts of the United States. These shifts have largely been good for consumers, promoting competition that often leads to lower electricity bills. But Daniel Kaffine, a University of Colorado Boulder economics professor, wanted to investigate another, less-obvious ripple effect: How are these shifts affecting the environment?

It’s a commonly held belief that competitive markets tend to be bad for the environment. But Kaffine finds the opposite to be true. His latest research, published in The Energy Journal, suggests that competitive whole electricity markets might help clean up the U.S. energy sector by reducing carbon emissions.

Daniel Kaffine, a CU Boulder professor of economics, finds in recently published research that competitive whole electricity markets might help clean up the U.S. energy sector by reducing carbon emissions.

“The conventional wisdom on a lot of these topics is not always correct, and environmental economics is a very useful structure and framework for developing more nuanced thinking about the relationship between the economy and the environment,” he says.

Understanding U.S. electricity markets

Before the 1990s, electricity in the United States primarily came from vertically integrated utilities—that is, one company that owned and operated the entire electricity supply chain. These one-stop-shop firms handled every phase of the process, from generating electricity at power plants to transmitting it to substations to distributing it to customers. Overseen by public utility commissions, these companies usually had the exclusive rights to serve a particular region.

However, in 1996, the Federal Energy Regulatory Commission issued two orders that transformed the nation’s electricity utility industry. The commission sought to break up public utilities and get more players into the mix, in hopes of lowering prices for consumers.

As a result, many states began moving away from the traditional utility model and toward competitive wholesale electricity markets. In regions that have made this shift, there are multiple sellers (companies that produce power) and multiple buyers (local utilities that provide electricity to customers).

For the new paper, Kaffine and co-author Doyoung Park, a former CU Boulder graduate student who is now an assistant professor of agricultural economics at Texas A&M University, turned their attention to one such market.

They looked at the Southwest Power Pool, an independent system operator and regional transmission organization that manages the grid for some or all parts of 14 states. These are Arkansas, Iowa, Kansas, Louisiana, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas and Wyoming.

The Southwest Power Pool is a bit like an air traffic controller. It doesn’t own any of the region’s electricity infrastructure—things like power lines and poles—but it does operate them. It coordinates the flow of electricity, monitors congestion and prevents outages and emergencies.

Another big role the Southwest Power Pool plays is that of auctioneer, Kaffine says. Each day, it is in charge of sourcing enough power to meet the region’s anticipated demand for the following day. This is what’s known as the “day-ahead energy market,” and it functions like an auction.

“You have buyers and sellers of power,” Kaffine says. “The people who sell power offer up a certain amount of electricity at a certain price. And, basically, the cheapest bids win. Those are the power plants that end up producing power the next day.”

CU Boulder researcher Daniel Kaffine and colleague Doyoung Park studied carbon emissions from power plants within the Southwest Power Pool before and after the introduction of day-ahead markets. They compared the emissions intensity, or the amount of carbon dioxide emitted per unit of power generated.

(The Southwest Power Pool also runs real-time markets every five minutes. But, for their study, Kaffine and Park focused only on the day-ahead markets, which were created in 2014.)

Consumers are not involved in this process, which runs seamlessly in the background to produce a continuous stream of on-demand electricity. But, because of the competition between sellers, they do end up paying lower electricity bills every month. And, according to Kaffine’s research, society as a whole gets the benefit of reduced carbon emissions.

Carbon emissions decline in free markets

For the study, Kaffine and Park looked at carbon emissions from power plants within the Southwest Power Pool before and after the introduction of day-ahead markets. They compared the emissions intensity, or the amount of carbon dioxide emitted per unit of power generated.

To isolate the effects of the day-ahead markets and rule out other variables, they also compared the data to a similar power pool in Pennsylvania, New Jersey and Maryland, called PJM Interconnection.

When they crunched the numbers, the researchers found that the day-ahead markets caused a 4 percent drop in average carbon emissions intensity in the Southwest Power Pool. That equates to a reduction of roughly 7.66 million tons of carbon dioxide emissions and about $383.4 million in avoided damages per year.

“Shaving off 4 percent from every unit of power that gets generated really adds up,” Kaffine says.

When they drilled down into the data, Kaffine and Park were able to uncover the mechanisms responsible for the decrease in carbon emissions. Some individual power plants got slightly cleaner after the day-ahead markets were introduced. But the primary factor was the retirement of older, dirtier, costlier power plants in the region.

These plants simply couldn’t compete in the new environment, says Kaffine. When they shut down, what remained was a fleet of newer, cleaner and cheaper-to-run facilities—and that resulted in lower carbon emissions overall.

“It’s just like if you have an old air conditioner—it takes more power to run the thing, and that’s expensive,” he says. “In a power plant, if you have an old boiler, it takes more fuel input to produce power and that’s more expensive and dirtier.”

Looking ahead

“You have buyers and sellers of power. The people who sell power offer up a certain amount of electricity at a certain price. And, basically, the cheapest bids win. Those are the power plants that end up producing power the next day.”

Zooming out, the results challenge the long-held assumption that competitive markets are always detrimental to the environment. The findings might be different in other regions but, at least in the case of the Southwest Power Pool, the “market incentives lined up nicely with the environmental incentives,” Kaffine says.

In addition, the findings suggest that other states may want to consider creating or joining competitive electricity markets—for the economic advantages, but also for the potential environmental benefits. Many states in the Southeast and the West (with the exception of California) do not have competitive electricity markets.

Colorado, for example, still operates under the traditional, vertically integrated utility model. But a 2021 state law requires all non-municipal electric utilities that own transmission lines to join a wholesale electric market by 2030.

A study conducted by the Colorado Public Utilities Commission estimates this change could result in savings of up to $230 million each year. And Kaffine’s research suggests it may also lead to a reduction in carbon emissions, too.

“Rather than running an old, dirty plant here in Colorado, having a wholesale market might mean buying cheap wind [power] or cheap natural gas [power] from New Mexico,” says Kaffine. “They do some of that trading already, but having a market in place to facilitate that trade makes it easier to find lower-cost producers. And if the lower-cost producers happen to be cleaner, that’s a win for the environment as well as consumers.”

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CU Boulder economics researcher Daniel Kaffine finds that whole electricity markets might help reduce carbon emissions.

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CU Boulder instructor named a 2025-2026 Fulbright Scholar

Kylie Clarke — Tue, 15 Jul 2025 17:26:19 +0000

CU Boulder instructor named a 2025-2026 Fulbright Scholar Kylie Clarke Tue, 07/15/2025 - 11:26

Award will allow Teaching Professor Caroline Conzelman to teach and conduct research on sustainability in Murcia, Spain

Caroline Conzelman, a teaching professor in the College of Arts and Sciences Residential Academics Program (RAP) at the University of Colorado Boulder, has received a Fulbright Senior U.S. Scholar Program award in international affairs and environmental studies for fall 2025 in Spain. The award is provided by the U.S. Department of State and the Fulbright Scholarship Board.

Conzelman’s Fulbright project is titled “Participatory Action Research on Urban-Rural Sustainability Challenges in Murcia, Spain.” Partnering with the Universidad de Murcia, Conzelman will work with undergraduate students to examine sustainability challenges in urban and rural areas of the valley of Murcia.

Trained as a cultural anthropologist, Conzelman’s objectives are to provide students with mentorship and training in applied ethnographic research methods to study how civil society, business and government leaders define and promote sustainable business goals. Additionally, she will give a series of workshops and organize a symposium on campus to present her findings and highlight innovative local solutions as well as meaningful career paths.

“I am honored to have this opportunity and am excited to work with and learn from the faculty and students at MU, and to help facilitate relationships between our universities in support of sustainability through social innovation, entrepreneurship and community engagement,” Conzelman said. “I appreciate the many and varied experiences I have had at CU over the last 28 years that allowed me to be a successful candidate.”

Each year, more than 800 individuals teach or conduct research abroad through the Fulbright U.S. Scholar Program. Since 1946, the Fulbright Program has provided more than 400,000 talented and accomplished students, artists and professionals with the opportunity to study, teach and conduct research abroad. Notable awards received by alumni include 63 Nobel Prizes, 98 Pulitzer Prizes and 82 McArthur Fellowships.

“The benefits extend beyond the individual recipient, raising the profile of their home institutions. We hope University of Colorado Boulder can leverage Caroline Conzelman’s engagement abroad to establish research and exchange relationships, connect with potential applicants and engage with your alumni in the host country,” the Fulbright Program said in its award announcement.

Fulbright is a program of the U.S. Department of State, with funding provided by the U.S. government. Participating governments and host institutions, corporations and foundations around the world also provide direct and indirect support to the program, which operates in more than 160 countries worldwide.

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Award will allow Teaching Professor Caroline Conzelman to teach and conduct research on sustainability in Murcia, Spain.

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Baker brings delicious sustainability to the table

Rachel Sauer — Tue, 15 Jul 2025 13:30:00 +0000

Baker brings delicious sustainability to the table Rachel Sauer Tue, 07/15/2025 - 07:30

Cody DeBos

Gregor MacGregor, assistant teaching professor of environmental studies, focuses on local economies and environmental justice in his Vulcan Mine Bakery

On a quiet street in Lafayette, Colorado, the smell of rosemary and fresh bread often drifts from a solar-powered oven just before dawn. It’s where you’ll find Gregor MacGregor, a University of Colorado Boulder assistant teaching professor with the Masters of the Environment Graduate Program in the Department of Environmental Studies and the online Outdoor Recreation Economy program, conducting a carefully orchestrated dance of timers, dough balls and donut boxes.

His micro-bakery is a far cry from the courtroom or a university lecture hall, where he also spends his time. But to MacGregor, there’s a through line to it all: caring for the planet and the people in his community.

Gregor MacGregor, a CU Boulder assistant teaching professor of environmental studies and a water attorney, began baking bread with his daughters during COVID lockdowns and eventually opened Vulcan Mine Bakery. (Photo: Gregor MacGregor)

“During the COVID lockdown, I was looking for activities to do with my daughters. As my wife characterizes it, we baked a loaf of bread and a dozen donuts, then decided to open a bakery,” he says.

That spontaneous project eventually became Vulcan Mine Bakery. The name, a nod to the former coal mine near his home, reflects MacGregor’s dedication to environmental awareness.

Sustainability you can taste

MacGregor brings his experience as a water attorney and former U.S. Army officer to the bakery in many ways. Having extensively researched circular economies, he built Vulcan Mine Bakery as a truly local operation.

“My milk comes from a dairy in Longmont, I use duck eggs from a farm in Lafayette, I purchase Colorado sugar beet sugar and my grain comes from a farm in Hugo that I mill in house,” he says.

Even the energy source is intentional. Vulcan Mine’s singular oven is powered by rooftop solar panels. MacGregor sees these choices as essential not just for sustainability, but for flavor—and education.

He says, “The public imagination hasn’t quite adopted the fresh food, farm-to-table movement for baked goods yet. That changes when you let someone take in a breath of freshly milled flour.”

Operating under Colorado’s Cottage Foods Act (CFA) helps MacGregor keep his overhead low and his connections local.

“The CFA unlocks opportunities for entrepreneurs to experiment, grow their chops and see if moving on to a food truck or brick-and-mortar store makes sense for them,” he says.

MacGregor adds, “We should explore every avenue to help locals succeed so we all have options to spend and keep money in our communities, with people we care about, and with people who care where our food comes from.”

In summer 2025, Gregor MacGregor spent about two weeks in Ukraine baking bread with Kharkiv’s Hell’s Kitchen organization, supplying about 900 meals and 1200 rolls a day to hospitals, refugees and other groups. (Photo: Gregor MacGregor)

Flour and fellowship

For MacGregor, food is also a tool for justice.

“Food justice is absolutely a part of environmental justice—having the basic necessities to survive at the low end and having the opportunity to participate in the system in a culturally and economically significant way at the high end,” he says.

MacGregor embraces the opportunity to live out this philosophy through Vulcan Mine Bakery and regularly donates baked goods to those in need.

In 2021, MacGregor created a special menu of Afghan and American treats for newly arriving families of Afghan refugees.

“I got to visit some of the families with their sponsors to share food and stories. It was an incredible way to meet our new neighbors and help them feel welcome,” he says.

MacGregor’s service work also extends far beyond Colorado’s borders.

“Last summer, I spent about two weeks in Ukraine baking bread with Kharkiv’s ‘Hell’s Kitchen’ organization. We supplied about 900 meals and 1200 rolls a day to hospitals, refugees and other groups. We also drove and delivered food, medicine and clothing out into the countryside to villages in need,” he says.

As someone who has spent years working in environmental law and teaching policy, MacGregor is acutely aware of the systems that shape equity and resilience. Baking has given him a new way to get involved.

“Very few people smile when you show up as an attorney, but almost everyone smiles when you show up as a baker,” he says.

A taste of history

MacGregor’s loaves do more than just nourish. Thanks to his interest in holiday baking, they also spark curiosity and conversations about heritage.

Inspired by an old cookbook titled Celebration Breads, MacGregor often bakes traditional and seasonal recipes that let customers taste the intersection of history, culture and community.

“There’s a recipe for the boozy Hartford Election Cake, which I have not seen baked anywhere else, but which used to be a vital part of early-American democracy,” he explains.

“Like many of our other celebratory breads, it contains a great amount of cultural history within it that relates to the why and when of our consumption.”

Lessons from a loaf

Though Vulcan Mine Bakery is now a part of MacGregor’s daily life, it hasn’t replaced his identity as a champion of the environment. It’s only strengthened his desire to have an impact.

“I love baking because I get to work with my hands, chat with people and see how much they appreciate my bread. I think that last bit, the connection with others and serving them, is what really makes it worthwhile,” he says.

MacGregor sees his bakery as an extension of his environmental teaching, a chance to live out sustainability and connection in a tangible way. He also encourages others to look for similar opportunities in their own lives.

“If you already have a skill, you can probably put it to good use for yourself and others,” he says. “There is great need in the world, but you don’t need great means to have an impact.”

In 2021, Gregor MacGregor created a special menu of Afghan and American treats (shown here) for newly arriving families of Afghan refugees.

For Gregor MacGregor (left, making donuts with his wife, Kelly, and daughter Madeleine), baking is a family affair. He and his daughters began making bread during COVID lockdowns, which eventually led to opening Vulcan Mine Bakery.

Inspired by an old cookbook titled “Celebration Breads,” Gregor MacGregor often bakes traditional and seasonal recipes that let customers taste the intersection of history, culture and community.

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Gregor MacGregor, an assistant teaching professor of environmental studies, focuses on local economies and environmental justice in his Vulcan Mine Bakery.

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That lightbulb represents more than just a good idea

Rachel Sauer — Tue, 08 Jul 2025 18:39:18 +0000

That lightbulb represents more than just a good idea Rachel Sauer Tue, 07/08/2025 - 12:39

Rachel Sauer

In research recently published in Science, CU Boulder scientists detail how light—rather than energy-intensive heat—can efficiently and sustainably catalyze chemical transformations

For many people, the role that manufactured chemicals plays in their lives—whether they’re aware of it or not—may begin first thing in the morning. That paint on the bedroom walls? It contains manufactured chemicals.

From there, manufactured chemicals may show up in prescription medicine, in the bowls containing breakfast, in the key fob that unlocks the car, in the road they take to work. These products are so ubiquitous that it’s hard to envision life without them.

Professor Niels Damrauer and his CU Boulder and CSU research colleagues were inspired by photosynthesis in designing a system using LED lights to catalyze transformations commonly used in chemical manufacturing.

The process of transforming base materials into these desired products, however, has long come at significant environmental cost. Historically, catalyzing transformations in industrial processes has frequently used extreme heat to create the necessary energy.

Now, continuing to build on a growing body of research and discovery, University of Colorado Boulder scientists are many steps closer to using light instead of heat to catalyze transformations in industrial processes.

In a study recently published in Science, Niels Damrauer, a CU Boulder professor of chemistry and Renewable and Sustainable Energy Institute fellow, and his research colleagues at CU Boulder and Colorado State University found that a system using LED lights can catalyze transformations commonly used in chemical manufacturing. And it’s entirely possible, Damrauer says, that sunlight could ultimately be the light source in this system.

“With many transformations, the economics are, ‘Well, I need this product and I’m going to sell it at this price, so my energy costs can’t be larger than this amount to make a profit’,” Damrauer says. “But when you start to think about climate change and start to think about trying to create more efficient ways to make things, you need different approaches.

“You can do that chemistry with very harsh conditions, but those harsh conditions demand energy use. The particular chemistry we are able to do in this paper suggests we’ve figured out a way to do these transformations under mild conditions.”

Inspired by plants

Damrauer and his colleagues—including first authors Arindam Sau, a CU Boulder PhD candidate in chemistry, and Amreen Bains, a postdoctoral scholar in chemistry at Colorado State University in the group of Professor Garret Miyake—work in a branch of chemistry called photoredox catalysis, “where ‘photo’ means light and ‘redox’ means reduction and oxidation,” Damrauer explains. “This type of chemistry is fundamentally inspired by photosynthesis. A lot of chemistry—not all of chemistry, but a huge fraction of chemistry—involves the movement of electrons out of things and into other things to make transformations. That happens in plants, and it happens in photoredox catalysis as well.

“In photosynthesis, there’s a beautiful control over not only the motion of electrons but the motion of protons. It’s in the coupling of those two motions that a plant derives functions it’s able to achieve in taking electrons out of something like water and storing it in CO2 as something like sugar.”

Further inspired by photosynthesis and a plant’s use of chlorophyl to collect sunlight, the research team used an organic dye molecule as a sort of “pre-catalyst” that absorbs light and transforms into a catalyst molecule, which also absorbs light and accelerates chemical reactions. And because the four LED lights surrounding the reactor are only slightly brighter than a regular home LED lightbulb, the transformation process happens at room temperature rather than extreme heat.

The molecule is also able to “reset” itself afterward and harvest more light, beginning the process anew.

“We set out to understand the behavior of a photocatalyst that was inefficient at this process, and my student Arindam discovered there was this fundamental transformation to the molecule occurring while we did the reaction,” Damrauer says, adding that the team discovered there are key motions not just of electrons, which is essential for photoredox, but also of protons.

“In our mechanism, the motion of the proton occurs in the formation of a water molecule, and that very stable molecule prevents another event that would undermine the storage of energy that we’re trying to achieve,” Damrauer says. “We figured out what the reaction was and, based on that reaction, we started to make simpler molecules.

“This was a really fortuitous discovery process: We were studying something, saw a change, took the knowledge of what that change was and started to design systems that were even better. This is the best advertisement for basic science—sometimes you can’t design it; you’ve got to discover things, you’ve got to have that freedom.”

A sunny future

Damrauer, Sau and their colleagues in the multidisciplinary, multi-institutional Sustainable Photoredox Catalysis Research Center (SuPRCat) are continuing to build on these discoveries, which happen at a small scale now but may have the potential for large-scale commercial use.

In an essay for The Conversation, Sau noted, “Our work points toward a future where chemicals are made using light instead of heat. For example, our catalyst can turn benzene—a simple component of crude oil—into a form called cyclohexadienes. This is a key step in making the building blocks for nylon. Improving this part of the process could reduce the carbon footprint of nylon production.

“Imagine manufacturers using LED reactors or even sunlight to power the production of essential chemicals. LEDs still use electricity, but they need far less energy compared with the traditional heating methods used in chemical manufacturing. As we scale things up, we’re also figuring out ways to harness sunlight directly, making the entire process even more sustainable and energy efficient.”

Damrauer adds that he and his colleagues aren’t trying to change the nature of manufactured chemicals, but the approach to how they’re made. “We’re not looking at making more stable paint, for example, but we’re asking if it costs a certain number of joules to make that gallon of paint, how can we reduce that?”

In addition to Niels Damrauer, Arindam Sau and Amreen Bains, Brandon Portela, Kajal Kajal, Alexander Green, Anna Wolff, Ludovic Patin, Robert Paton and Garret Miyake contributed to this research.

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In research recently published in Science, CU Boulder scientists detail how light—rather than energy-intensive heat—can efficiently and sustainably catalyze chemical transformations.

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Harnessing the abundant resource of sunlight

Rachel Sauer — Tue, 24 Jun 2025 17:55:24 +0000

Harnessing the abundant resource of sunlight Rachel Sauer Tue, 06/24/2025 - 11:55

Arindam Sau , Amreen Bains and Anna Wolff

Light-powered reactions could make the chemical manufacturing industry more energy-efficient

Manufactured chemicals and materials are necessary for practically every aspect of daily life, from life-saving pharmaceuticals to plastics, fuels and fertilizers. Yet manufacturing these important chemicals comes at a steep energy cost.

Many of these industrial chemicals are derived primarily from fossil fuel-based materials. These compounds are typically very stable, making it difficult to transform them into useful products without applying harsh and energy-demanding reaction conditions.

Arindam Sau, a Ph.D. candidate in the CU Boulder Department of Chemistry, along with Colorado State University research colleagues Amreen Bains and Anna Wolff, have been working on a system that uses light to power reactions commonly used in the chemical manufacturing industry.

As a result, transforming these stubborn materials contributes significantly to the world’s overall energy use. In 2022, the industrial sector consumed 37% of the world’s total energy, with the chemical industry responsible for approximately 12% of that demand.

Conventional chemical manufacturing processes use heat to generate the energy needed for reactions that take place at high temperatures and pressures. An approach that uses light instead of heat could lower energy demands and allow reactions to be run under gentler conditions — like at room temperature instead of extreme heat.

Sunlight represents one of the most abundant yet underutilized energy sources on Earth. In nature, this energy is captured through photosynthesis, where plants convert light into chemical energy. Inspired by this process, our team of chemists at the Center for Sustainable Photoredox Catalysis, a research center funded by the National Science Foundation, has been working on a system that uses light to power reactions commonly used in the chemical manufacturing industry. We published our results in the journal Science in June 2025.

We hope that this method could provide a more economical route for creating industrial chemicals out of fossil fuels. At the same time, since it doesn’t rely on super-high temperatures or pressures, the process is safer, with fewer chances for accidents.

How does our system work?

The photoredox catalyst system that our team has developed is powered by simple LEDs, and it operates efficiently at room temperature.

At the core of our system is an organic photoredox catalyst: a specialized molecule that we know accelerates chemical reactions when exposed to light, without being consumed in the process.

Much like how plants rely on pigments to harvest sunlight for photosynthesis, our photoredox catalyst absorbs multiple particles of light, called photons, in a sequence.

These photons provide bursts of energy, which the catalyst stores and then uses to kick-start reactions. This “multi-photon” harvesting builds up enough energy to force very stubborn molecules into undergoing reactions that would otherwise need highly reactive metals. Once the reaction is complete, the photocatalyst resets itself, ready to harvest more light and keep the process going without creating extra waste.

Designing molecules that can absorb multiple photons and react with stubborn molecules is tough. One big challenge is that after a molecule absorbs a photon, it only has a tiny window of time before that energy fades away or gets lost. Plus, making sure the molecule uses that energy the right way is not easy. The good news is we’ve found that our catalyst can do this efficiently at room temperature.

Enabling greener chemical manufacturing

CSU chemistry researcher Amreen Bains performs a light-driven photoredox catalyzed reaction. (Photo: John Cline/Colorado State University Photography)

Our work points toward a future where chemicals are made using light instead of heat. For example, our catalyst can turn benzene — a simple component of crude oil — into a form called cyclohexadienes. This is a key step in making the building blocks for nylon. Improving this part of the process could reduce the carbon footprint of nylon production.

Imagine manufacturers using LED reactors or even sunlight to power the production of essential chemicals. LEDs still use electricity, but they need far less energy compared with the traditional heating methods used in chemical manufacturing. As we scale things up, we’re also figuring out ways to harness sunlight directly, making the entire process even more sustainable and energy-efficient.

Right now, we’re using our photoredox catalysts successfully in small lab experiments — producing just milligrams at a time. But to move into commercial manufacturing, we’ll need to show that these catalysts can also work efficiently at a much larger scale, making kilograms or even tons of product. Testing them in these bigger reactions will ensure that they’re reliable and cost-effective enough for real-world chemical manufacturing.

Similarly, scaling up this process would require large-scale reactors that use light efficiently. Building those will first require designing new types of reactors that let light reach deeper inside. They’ll need to be more transparent or built differently so the light can easily get to all parts of the reaction.

Our team plans to keep developing new light-driven techniques inspired by nature’s efficiency. Sunlight is a plentiful resource, and by finding better ways to tap into it, we hope to make it easier and cleaner to produce the chemicals and materials that modern life depends on.

Arindam Sau is a Ph.D. candidate in the University of Colorado Boulder Department of Chemistry; Amreen Bains is a postdoctoral scholar in chemistry at Colorado State University; Anna Wolff is a PhD student in chemistry at Colorado State University.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Light-powered reactions could make the chemical manufacturing industry more energy-efficient.

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�鶹��Ժ are shaping (and leading) CU’s climate response

Rachel Sauer — Tue, 27 May 2025 18:12:47 +0000

�鶹��Ժ are shaping (and leading) CU’s climate response Rachel Sauer Tue, 05/27/2025 - 12:12

Cody DeBos

Fueled by a passion for climate justice and a commitment to student involvement in the university’s future, interdisciplinary graduate student team designs and teaches undergrad course on climate action planning

As the University of Colorado Boulder continues to advance its Climate Action Plan (CAP), an interdisciplinary group of graduate students has championed a new way to involve students in shaping a more sustainable future.

Initially, the CU steering committee creating the CAP did not involve students. In response to the exclusion of student voices, a group of graduate students began work to give students a seat at the table and engage the undergraduate community in CU’s climate-planning work. First, the group launched a petition calling for student participation in the drafting of the CAP. Then the group helped pass a resolution through student government to grant student seats on the committee implementing the CAP in the future.

“�鶹��Ժ have always been key drivers of sustainability and climate action on campuses across the U.S., including at CU Boulder,” the team says. “As young people, our futures are jeopardized by the climate crisis, so we have a collective stake in rapidly reducing our greenhouse gas emissions.”

The graduate students and faculty who co-designed and now teach an undergraduate course on climate-action planning include (left to right) Brigid Mark, Nadav Orian Peer, Jonah Shaw, Sean Benjamin, Mariah Bowman and Sara Fleming.

But the group didn’t stop there. Fueled by a shared passion for climate mitigation and the belief that students should help shape the university’s future, the group of five graduate students from four different departments spent hundreds of hours co-designing and now teaching an undergraduate course on climate-action planning.

The course gives undergrads hands-on experience with CU’s campus emissions data, collaboration opportunities with university stakeholders and a chance to develop sustainability strategies that could be implemented campuswide.

Their efforts recently earned the group CU Boulder’s 2025 Campus Sustainability Award for Student Leadership. The group also won a $5,000 scholarship from the women-led nonprofit Zonta Foothills Foundation, in recognition for their groundbreaking work in climate education and advocacy. The CU School of Engineering, following advocacy from generous faculty members David Paradis and Carol Cogswell, was also gracious enough to provide funding for their work.

A more engaging climate classroom

The group of graduate instructors brings an interdisciplinary approach and myriad perspectives to the classroom.

The teaching team includes Mariah Bowman (law), Sara Fleming (geography), Sean Benjamin (mechanical engineering), Brigid Mark (sociology) and Jonah Shaw (atmospheric and oceanic sciences). Each has worked to tackle climate-related issues through the lens of their expertise, from Indigenous environmental justice to climate-change modeling.

The team’s diverse makeup is reflected in the design of their course and has fueled their success. But the road to this point hasn’t been easy.

“This is a labor of love,” the team says. “We are doing this because we care. Funding and the time required have been challenges.”

Before the course launched, each graduate instructor spent many unpaid hours creating the syllabus, listing the course and building campus partnerships to access emissions data. During the semester, they spend many hours a week on teaching responsibilities that come in addition to their regular duties.

Financial support from the School of Engineering and the Zonta Foothills award has helped, but long term, the team hopes to see the course institutionalized and funded.

The team says, “Institutionalizing the course so that it runs each year and guaranteeing funding for instructors and teaching assistants would ensure the longevity and sustainability of this course. It would ensure continued involvement of students in the Climate Action Plan, and a more robust, actionable plan.”

An interdisciplinary group of graduate students (holding plaques) who worked work to give students a seat at the table and engage the undergraduate community in CU’s climate-planning work received CU Boulder’s 2025 Campus Sustainability Award for Student Leadership.

Hands-on climate action

From the start, the group has viewed student involvement as essential, not symbolic.

At the start of the semester, students gain foundational knowledge on topics like climate justice, global carbon budgets and emissions accounting. From there, they split into teams to tackle different emissions categories on campus: commuting, waste, business travel and student/parent flights.

“�鶹��Ժ work in four teams, each focused on a different category of campus emissions. They’re developing strategies to reduce emissions for their category, adding depth and student perspective to the high-level strategy suggestions in the CAP,” the instructors say.

Guest speakers, including administrators and national experts, round out the curriculum. �鶹��Ժ have heard from Stanford University’s sustainability team and CU Boulder faculty like Professor Karen Bailey (environmental studies) and Professor Nadav Orian Peer (law). They also meet with stakeholders across campus to refine their proposals.

The team believes this approach is the best way to facilitate opportunities to create actionable, equity-centered climate strategies grounded in real data.

“Involving students in climate initiatives enables them to apply knowledge about climate change to their own institution, experience they will carry to become leaders in climate action in their future workplaces and communities,” says Mark.

The results are already visible on campus.

One student team is working with CU’s transportation specialist to revise the campus commuting survey. Another is working on a survey for better tracking of student and parent air travel. Others are collaborating with dining services and facilities to reduce waste and consulting with faculty to provide more accurate emissions calculations of flights taken by faculty and staff.

“�鶹��Ժ often learn about the gravity of climate change without learning about solutions, which can be quite depressing,” says Mark.

An interdisciplinary team of graduate students teaches the climate-action planning course for undergraduate students.

“Involving students in climate-action planning and implementation can combat feelings of hopelessness and enable participation in creating real change.”

Impact on both sides

This student-led course has already sparked engagement on both sides of the classroom. One undergraduate took the initiative to launch a campus club to raise awareness about the CAP. Others hope to join implementation committees or pursue careers in sustainability.

“To me, this demonstrates that students are hungry for interdisciplinary courses that enable them to apply their skills and creativity to issues on campus and engage with solutions to the climate crisis,” Fleming says.

For Bowman, the most rewarding part of the experience is the students themselves. “They are passionate, knowledgeable, interested, hardworking and fun to be around! It has been deeply meaningful to get to train them on something I care so much about, and have them care about it in return,” she says.

And for Fleming, designing and teaching the course has also given her much. She adds, “Team teaching is so much fun, and I’ve learned so much from each of my teammates on both content and pedagogical skills.”

As for the future, the graduate instructors each plan to continue fighting for climate action in their respective fields, using their knowledge and experience to make a difference on campus, in state government and in the community.

They also hope CU continues what they started so future students can participate in a course that gives them a voice in the climate conversation through data, creativity and real-world collaboration.

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An apple a day? It’s the Boulder way

Rachel Sauer — Thu, 08 May 2025 17:18:27 +0000

An apple a day? It’s the Boulder way Rachel Sauer Thu, 05/08/2025 - 11:18

Rachel Sauer

Newly planted apple orchard on CU Boulder campus is a nexus of university and community partnerships and will be a living classroom for students and educators

For now, they are twiggy little things, all spindly adolescent limbs that nevertheless hint at future harvests. Saturday morning, one even wore a scattering of creamy white blossoms—flowers that, in years to come, once roots have gained hold and branches have stretched up and out, will grow into apples.

Is there anything more hopeful than planting a tree? Yes, planting a whole orchard of them.

On Saturday, years of planning, research and partnership-building bore fruit on an L-shaped plot in front of the University of Colorado Boulder 30th Street greenhouse, where more than two-dozen volunteers planted 30 apple trees in what had previously been a scrubby patch of turf.

Funded by a $90,000 Sustainable CU grant, the apple orchard will not only be a classroom and a living lab, but a nexus for community, a carbon sink and a vibrant example that sustainability can be delicious.

“It’s so exciting to see this happening,” says Amy Dunbar-Wallis, who this semester completed her PhD in the Department of Ecology and Evolutionary Biology and collaborated with CU Boulder faculty and students and community partners to bring the idea of the first orchard on CU Boulder campus to fruition.

“It represents how so many people on campus, so many people in the community, have come together to plant this orchard that will be a place to learn and a place to preserve a really neat part of Boulder’s history.”

In search of old apple trees

The new apple orchard grew from the Boulder Apple Tree Project, an initiative that began almost 15 years ago with a simple observation: There seemed to be a lot of old apple trees in Boulder.

Katharine Suding, a professor of distinction in the Department of Ecology and Evolutionary Biology, had recently moved to the area, “and I was really surprised to see so many old apple trees everywhere,” she recalled during the 2022 Apple Symposium. “I realized I had no idea about the histories and particularly the history of apples, so looking into it a little more, it was clear there are trees here that are remnants of past histories starting in the turn of (20th) century.

Amy Dunbar-Wallis (left) and Tiffany Willis (right, EBio'22) consult a chart designating where each tree would be planted in the new apple orchard in front of the 30th Street greenhouse Saturday morning. Willis, who lives in Boulder, took EBIO 1250 online during Covid lockdowns and was a lab assistant for the class in 2021.

“There are apple trees in Colorado and in Boulder that are remnants from old orchards that still exist. There are also remnants of trees that were planted when people came and built ranches or had farms here, and often they were bringing along apple trees from where they came from, whether it was Germany, whether it was the Midwest, whether it was Scandinavia.”

In fall 2017, the Boulder Apple Tree Project (BATP) sprouted, combining historical sleuthing with cutting-edge genetic testing and grafting to not only locate and catalog Boulder’s historic apple trees, but also to revive its legacy of apple growing. In the ongoing project, researchers gather data on the age and health of the trees, as well as the type and flavor of the apples, and the genetic diversity that the trees offer to future populations.

Suding and BATP co-principal investigator Lisa Corwin, an associate professor of ecology and evolutionary biology, have worked with undergraduate and graduate students not only to gather data, but also to develop the EBIO 1250 course, during which students conduct research on Boulder’s apple trees; curricula and materials in partnership with the CU Museum of Natural History; a database and app in collaboration with computer science students; an interactive map of apple trees that have been tagged and studied; and the A Power of Place Learning Experience and Research Network (APPLE R Net), a multi-institution research network directed by Corwin that introduces students to field research by involving them in a project examining apple trees across the Rocky Mountain region.

BATP also is part of the Historic Fruit Tree Working Group, which connects Colorado researchers with other apple-exploring groups and researchers across North America.

Mia Williams (left) waters a newly planted apple tree Saturday morning. Williams, who will graduate this summer, is double majoring in ecology and evolutionary biology and environmental studies.

“This project has grown so much since our initial community engaged Apple Blitz in 2018,” says Dunbar-Wallis. “We've tagged over 1,000 trees and created a database, taught multiple course-based undergraduate research experiences at CU and at colleges across Colorado and northern New Mexico, started a data-collection app and interactive map in collaboration with CU computer science capstone students and installed a demonstration orchard in collaboration with Boulder Open Space and Mountain Parks.”

The demonstration orchard, planted two years ago, functions as a teaching and research laboratory to explore how biodiversity affects the functioning of apple orchards and their services to human well-being, including efficient water use, pollinator habitat and structural complexity supporting natural pest control.

A part of the narrative

The idea for the 30th Street orchard was revived by a group of six undergraduate and two graduate students almost two years ago, who proposed resubmitting a grant application that hadn’t been accepted in 2019.

“We’re a group who really love what we do and love apple trees and working with the soil,” says Katie Mikell, an ecology and evolutionary biology student who is graduating today and who was a member of the team that crafted and submitted the grant proposal.

“Before, (the orchard plot) was a lawn full of monoculture turf grass, so part of our argument was that if we put in an apple orchard, it would create a carbon sink (a system that absorbs more carbon than it releases), it would save the school money and anyone walking by could pick an apple. Plus, once the trees are producing, we can donate apples to the food pantry. Everyone can benefit from an apple orchard.”

Deidre Jaeger (right, PhDEBio'22) and her sons Sage, 4 (left), and Cedar, 1 (center), plant apple trees at the 30th Street orchard Saturday morning. Jaeger was a postdoctoral researcher in the Department of Ecology and Evolutionary Biology and an advisor for the Center for Sustainable Landscapes and Communities and is a researcher with the Boulder Apple Tree Project.

�鶹��Ժ prepared the 30th Street site during fall semester, working with departments and organizations across the university, as well as many community partners. The trees planted Saturday are about three years old and were obtained from Widespread Malus and Benevolence Orchard in Boulder.

“Our students are at the core of the university, and their passion and ingenuity are critical to our values around infusing sustainability throughout CU Boulder. This orchard exemplifies that pursuit in so many ways,” says Vice Chancellor for Sustainability Andrew Mayock.

“It is not only helping to protect biodiversity in our community. It will help feed those in need on our campus and create a living-learning laboratory space where sustainability leaders of the future will learn and develop strategies for urban agriculture planning.”

Fifteen varieties of apples are represented in the orchard, including locally grown historic cultivars like Wolf River and Colorado Orange. A beloved apple tree on the Bobolink Trail is even represented in a newly planted graft.

“There’s so much learning that can happen in an orchard,” says Manuela Mejia, an ecology and evolutionary biology PhD student who will conduct her doctoral research, which will include studying insect diversity, at the orchard. “So many facets of science are represented here.”

In addition to trees, the orchard will include an understory of native, drought-tolerant grasses and pollinator-friendly wildflowers, notes Mia Williams, who is majoring in environmental studies and ecology and evolutionary biology and will graduate this summer.

“It’s really exciting that this orchard will become a part of the story of agriculture in this area,” Dunbar-Wallis says. “We’ve tagged more than 1,000 trees (through BATP) and some of them are a hundred years old, so you think about everything they’ve seen and been through, the history that they hold, their stories, and now these trees—which are little now and probably won’t produce fruit for two or three years—are part of that narrative.”

Sophie Small (left) and Amy Dunbar-Wallis (right) fill a wheelbarrow with compost Saturday morning to prepare for planting an apple orchard in front of the 30th Street greenhouse. Small, a freshman who is studying biomedical engineering, learned about the project through the CU Farm and Garden Club.

Sophie Small (left), Isaac Kou (center) and Kyrie MacArthur dig a hole Saturday morning before planting an apple tree in it. Small is studying biomedical engineering, Kou just graduated with a major in computer science and a minor in ecology and evolutionary biology and MacArthur is studying history and education.

Amy Dunbar-Wallis (PhDEBio'25) digs a hole for a young apple tree Saturday morning.

Amy Dunbar Wallis (left, black vest) educates student and community volunteers Saturday morning before they plant 30 apple trees in front of the 30th Street greenhouse.

The apple trees planted in the 30th Street orchard Saturday morning, one of which even bloomed, are three years old and should begin producing fruit in two or three years.

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Newly planted apple orchard on CU Boulder campus is a nexus of university and community partnerships and will be a living classroom for students and educators.

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