Sophia Bush

Actress, Humanitarian & Author

Adrian Grenier

Actor Known for HBO's "Entourage"; Environmental Activist; UN Ambassador

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Alexandra Cousteau | This Week in CA News | KQED Newsroom ...

Arnold Schwarzenegger

Actor, Producer, Director, Writer; California’s 38th Governor; Host of "Celebrity Apprentice"

Louie Schwartzberg

Award-Winning Cinematographer, Director, Photographer and Filmmaker

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Al Gore

45th Vice President of the United States, Nobel Peace Laureate & Bestselling Author

Al Gore at the Opening of the #COP27 World Leaders Summit

Jamie Oliver

Celebrity Chef, Bestselling Author & TV Personality

Ian Bowles

Environmentalist & Energy Expert; Co-Founder of WindSail Capital Group

Karina Smirnoff

Professional Dancer on "Dancing with the Stars" & Author of "We're Just Not That Into You: Dating Disasters from the Trenches"

Doug Fine

Globe-Trotting Journalist, Award-Winning Climate Correspondent, Goat-Herder & Author

Alyssa Milano

Actress, Author, Philanthropist & Founder of Touch by Alyssa Milano; Known for "Charmed" and "Who's the Boss"

Bono

Lead Singer of U2, Activist & Co-Founder of DATA (Debt, AIDS, Trade, Africa)

Matt Damon

Actor, Screenwriter & Producer; Co-Founder of Water.org; Expert Advocate on Global Water & Sanitation Crisis

Tensie Whelan

Director of NYU's Center for Sustainable Business; Former President of the Rainforest Alliance

Philippe Cousteau

Explorer, Social Entrepreneur & Environmental Advocate; Grandson of Captain Jacques-Yves Cousteau

David Doubilet

National Geographic Photographer & Founding Member of the International League of Conservation Photographers

Oceans Through The Lens Of Time | David Doubilet

Leonardo DiCaprio

Award-Winning Actor & Environmentalist

Robert Redford

Actor, Director, Producer, Environmentalist & Founder of the Sundance Film Festival

Edward Norton

Award Winning Actor & Filmmaker