Barbara Boxer

Former Democratic Senator of California

Michael Shellenberger

Founder & President of Environmental Progress; Expert on Energy, Climate, Security, Human Development and Politics

Pat Wood

CEO of the Hunt Energy Network; Former Chairman of the Federal Energy Regulatory Commission

David Crane

Strategic Advisor Executive at Pegasus Capital Advisors; Former President & CEO of NRG Energy, Inc.; Climate Advocate

Christiana Figueres

Expert on Global Climate Change; Former Executive Secretary of the UN Framework Convention on Climate Change

Rob Harmon

President and CEO of EnergyRM

Shel Horowitz

Green Guerrilla Marketer, National Environmental Hall of Fame, Social Activist, and Author

Mark Ruffalo

Actor, Director, Producer, Screenwriter & Environmental Activist

Chad Pregracke

Founder of Living Lands & Waters, CNN's Hero of the Year for 2013, Environmental Speaker & Bestselling Author

Alex Epstein

Founder, Center for Industrial Progress Author, Fossil Fuels Improve the Planet

Darren Aronofsky

Filmmaker & Director Known for "Black Swan" & "The Wrestler"

Bindi Irwin

Wildlife Conservationist & Daughter of Steve Irwin; Season 21 Contestant on "Dancing With the Stars"

Daniel Schnitzer

Daniel Schnitzer is the founder of EarthSpark International, a company dedicated to helping create clean energy supply chains in Haiti.

Miranda Ballentine

Director of Sustainability, Wal-Mart Stores Inc.

Leilani Munter

Professional Race Car Driver & Environmental Activist

Jonathan Trent

Former Director of Offshore Membrane Enclosures for Growing Algae; Founder of UpCycle Systems

Fatih Birol

Executive Director of the International Energy Agency

Joan Baez

Legendary Folk Musician & Human Rights Activist

Harvey Wasserman

Journalist, Author, Democracy Activist & Advocate for Renewable Energy

Sara Schoen

Social Critic and Sustainability Champion

Christine Ervin

Former US Assistant Secretary of Energy; National Leader on Green Buildings & Clean Energy

Hayden Panettiere

Actress Known for "Nashville" & "Heroes" & Animal Rights Activist

Peniel E. Joseph

Justice, Equity, Diversity & Inclusion Speaker; Ethics and Political Values Expert; Founding Director of the Center for the Study of Race and Democracy at the University of Texas at Austin

The Cadillac Three

Country Music Group Known For "White Lightning," "The South" & "Party Like You"

Luis Guzman

Puerto Rican Actor Known for "Wednesday" & "Narcos"

Vijay Gurbaxani

Director of the Center for Digital Transformation & Taco Bell Professor of Business & Computer Science

Scott Dikkers

Founder of The Onion.com & Best-Selling Author

Zuhairah Washington

Technology Executive & Angel Investor

John Lee Dumas

Host of EntrepreneurOnFire

Tara Brach

Author & Mindfulness Teacher; Host of the "Tara Brach" Podcast

Trusting the Gold: Uncovering Your Natural Goodness