Green team Academy


Green Team Academy is a nonprofit based in Denver, Colorado. We are a fiscally sponsored project of Social Good Fund, a California nonprofit corporation and registered 501(c)(3) organization, Tax ID (EIN) 46-1323531. 

Our Mission

We empower everyday people to #BeTheChange. 

We help people get together, make a difference, and feel better by starting and growing thriving green teams in their communities. We bring people together across the world to collaborate and create a more just and verdant world.

Our Vision

Green Team Academy is working to become the global leader in mentoring and mobilizing communities. 

Our Values

We believe that every person is an expert in their own community. With a little bit of support and guidance, they can take their ideas for improvements and make them a reality.

We see people around the world stepping up to become grassroots leaders, quickly getting environmental and community initiatives off the ground and making a positive impact.

We believe that we can transform our world by offering individuals an opportunity to transform themselves and their communities. 

We believe in making extra efforts to reach out to those who have been impacted most by environmental and economic inequities. We know that when we develop relationships with people in our communities and across the world, we all benefit.  

Our Team

Meet the team that's helping make the magic happen! As a new nonprofit, we are starting with an Interim Board of Advisors and a Community Advisory Board. We are excited to be creating an inclusive board with youth and a diverse group of people from around the world. Interested in joining our team? Apply as a volunteer.

Gin DeMaio


Gin became the director of Green Team Academy in December of 2021. With a background in renewable energy and expertise in business development, Gin is excited and honored to lead the organization in the next phase. Gin brings her passion for the planet and visionary leadership to further the goal of empowering everyday people to #BeTheChange!

Christopher Tumusiime

Christopher Tumusiime


Founder and Team Leader of Trinity Forestry Services in Uganda, Christopher is a forester and environmentalist. Chris works on urban farming and forestry, with a goal of creating opportunities for youth and positive societal transformation.

Darwin Malwele

Darwin Malwele


Darwin is the founder of Earth Guardians Zambia and  Team Lead for Stop Ecocide Zambia. He is a trained Climate Reality Leader. He is working to plant 10,000 trees and start 100 gardens in Zambia. He is a 2020 International Climate Action Challenger and Eco-Champion Award Winner. 

Eloise Thomas

Eloise Thomas


Eloise was raised on a farm in a big family in Dominica. Eloise is a former national athlete. She has worked in higher education as a registrar and is currently pursuing a degree in mental health with a focus on nutrition.  Eloise is the founder of echo78,a nonprofit that focuses on youth empowerment and climate change. She is a co-founding member of WAVE (Waitukubuli Advocates for Viable Environments) and heavily involved in regenerative agriculture.

Jaxon Parikh

Jaxon Parikh


Jaxon is one of the Co-Founders of Glow + Gather and has been running this business for four years now. He is a young business owner, specializing in making gourmet salts, sugars, spices, and body products. Jaxon is  hardworking and loves helping people launch and establish their businesses. 

Nan Holda

Nan Holda


Nan works as a program coordinator for Howard Hughes Medical Institute. She is an eco-warrior of four decades, with expertise in education, nonprofit management, marketing, writing, and editing. Nan is a mentor for the Society to Advance Chicanos/Hispanics & Native Americans in Science (SACNAS) at the University of Illinois at Urbana-Champaign

Peter Marinelli

Peter Marinelli


Peter spends most of his waking hours on environmental and climate justice. He is the Environmental Justice Lead for Climate Reality Chicago Metro Chapter and the liaison for the Poor People’s Campaign to Climate Reality. He is a connector bringing people together across groups. Peter’s expertise includes board governance, organizational change facilitation, public speaking, research, and contract law. 

Shaina Oliver

Shaina Oliver


Shaina, a tribal member of the Navajo Nation from Shiprock, New Mexico, is an advocate for Indigenous Peoples’ Rights. Shaina is a field organizer for Moms Clean Air Force working on air quality issues, with a focus on environmental justice for Indigenous communities and communities of color. Shaina testifies at EPA hearings and in support of environmental bills as a way to protect all living beings and secure a future for all children.

What We Do

To achieve our mission, we build our community throughout the year. We offer opportunities for individuals who are enthusiastic about protecting the planet to join our community. We are different from many other organizations in that we don't just raise awareness about environmental and community issues. We inspire action and offer coaching and support so that people can successfully #BeTheChange. 

April: Earth Week Summit

In April 2022, we hosted the 4th Annual Earth Week Summit. In the virtual summit, we hosted workshops, happy hours, and community discussions. The summit showcases grassroots leaders who are making a difference and provides opportunities for connection, collaboration, and celebration. Learn more.

June: Summer Arts FUNdraiser Series

In June 2021, we hosted our 1st Annual Summer Arts FUNdraiser Series. This series runs from June 1 - August 10 and includes live arts-based events. With our community partners, we host cooking and gardening demos, painting classes, mini-concerts, and film screenings. Our FUNdraiser series helps fund the International Climate Action Challenge and our efforts throughout the year.  Learn more.

August: Wild & Scenic Film Festival On Tour

This is our first year partnering with South Yuba River Citizens League for Green Team Academy presents the Wild & Scenic Film Festival on August 3, 2021. Our lineup features 12 short films with empowering stories of youth, Black, Indigenous, and People of Color. The festival includes a Happy Hour, live screening, video on demand, and Filmmaker Q&A. Through ticket sales and sponsorships, we are raising funds to support our programming. Learn more

August: International Climate Action Challenge

We host an annual International Climate Action Challenge. This is an 18-week facilitated experience to help regular people from around the world go from passion to action in 90 days. We provide structure, coaching, and accountability in a fun, accelerator-type experience. 

In 2020, our top 29 teams planted 43,000 trees, started 55 gardens and two urban farms, completed 84,000 voter outreach contacts, provided typhoon relief, and held clean-ups and food drives. The challenge resulted in the formation of sustainability groups in communities around the world, including Team GREAT Golden, Fountain Together, and Drawdown Alberta. 

In 2021, we helped 75 teams from 28 countries launch environmental and community initiatives in 90 days. We featured the top teams in our December Impact Summit. We count on community volunteers and partners to help us meet this audacious goal! Learn more.

December: Impact Summit & Fundraising Campaign

We wrap up our year with a fundraising campaign in conjunction with the end of our 90-day challenge. In 2021, the Impact Summit will be held December 14 - 16. The summit features our top teams and highlights Green Team Academy's impact. We offer many ways to participate in our campaign through purchasing a ticket and attending the summit, volunteering, donating, or becoming a sponsor. Learn more.

Climate Action Challenge Book & Workbook

Released in July 2020, this book was written by Joan Gregerson as the handbook she wished someone had given her as a teenager when she first decided she wanted to make a difference. The book and workbook provide inspiring stories, key principles, and a step-by-step approach to launching an eco-initiative in 90 days. The book was selected as one of the top 12 books on climate change on Earth Day 2021 by climate activists. Learn more.

Green Team Academy Podcast

Since our podcast began in 2019, we've produced over 120 episodes. The podcast features tips and interviews with experts and community leaders. The goal is to provide inspiration and practical advice to people who want to make a positive impact on their communities and the environment. Learn more.

Consulting, Training, and Speaking

We offer services to help school districts, cities, neighborhoods, faith communities, businesses, and other groups have a bigger impact. We use the "mentor and mobilize" approach to help develop grassroots leaders. We help create networks of teams with annual plans that can increase the impact many times over, whether in school eco-clubs, for neighborhood teams, for corporate green teams, or as part of a citywide climate action plan. Learn more.

Our History


  • Green Team Academy was founded in 2018 by Joan Gregerson, as a project under her business, Positive Energy Works LLC, based in Denver, Colorado, USA. 


  • Launched Green Team Academy Podcast.
  • Mentored over 20 new and existing green teams in the Metro Denver area through the Green Team Accelerator Lab. The Denver Compost Challenge and other initiatives were launched through this accelerator. 
  • Hosted the 1st Annual Earth Week Summit.


  • Hosted the 2nd Annual Earth Week Summit.
  • Joan Gregerson published the book: Climate Action Challenge: A Proven Plan for Launching Your Eco-Initiative in 90 Days.
  • Hosted the 2020 International Climate Action Challenge with 122 participants from 21 countries using the method in the Climate Action Challenge book and workbook. 
  • Created profiles and videos and featured the top 29 teams in the 2020 International Climate Action Challenge Impact Summit.


  • Hosted the 3rd Annual Earth Week Summit.
  • Structure change: Green Team Academy was spun off to operate as a Denver, Colorado-based nonprofit project on May 20, 2021. We are now a fiscally sponsored project of Social Good Fund, a California nonprofit corporation and registered 501(c)(3) organization, Tax ID (EIN) 46-1323531.
  • Hosted the 2021 Summer Arts FUNdraiser Series including the Green Team Academy presents Wild & Scenic Film Festival on August 3, 2021. 
  • Hosted the 2021 International Climate Action Challenge which kicked off on August 18, 2021. The 90-day challenge runs September 1 - November 30, 2021. This year, 75 teams from 28 countries and a total of 275 challengers participated. Meet our challengers and see our impact. 
  • Hosting the 2021 International Climate Action Challenge Fundraising Campaign: November 1 - December 31, 2021. Meet our challengers and read our impact report.