Xiuhtezcatl Martinez

Indigenous Climate Activist, Hip-Hop Artist, Author & Youth Director of Earth Guardians

Sheila Watt-Cloutier

Environmental, Cultural & Human Rights Advocate, Former Canadian President of the Inuit Circumpolar Council

Dr. Sylvia Hood Washington

Chief Environmental Research Scientist at Environmental Health Research Associates, LLC.

Dr. Jan Pol

Veterinarian; Star of Nat Geo Wild's "The Incredible Dr. Pol"

Wallace J. Nichols

Scientist, Activist & Author Who Will Change the Way You Think About Water

Katharine Hayhoe

Atmospheric Scientist, Professor of Political Science & Director of Climate Science Center at Texas Tech, Lead Scientist with The Nature Conservancy

Saving Us: A Climate Scientist's Case for Hope and Healing in a Divided World

Boyd Varty

Author of "Cathedral of the Wild," Speaker & Conservationist at Londolozi Game Reserve

Andy B. Casagrande

National Geographic Cameraman

Ramez Naam

Computer Scientist, Science Fiction Author & Co-Chair of Energy & Environment at Singularity University

Ramez Naam - Exponential Innovation | SingularityU Thailand Summit

Amy Dickman

Animal Conservationist & Wildlife Ecologist

Bob Langert

Senior Sustainability Associate, The Context Network Editor at Large for GreenBiz & Author of "The Battle To Do Good: Inside McDonald's Sustainability Journey"

Ayana Elizabeth Johnson

Marine Biologist, Conservation Strategist, Founder & CEO of Ocean Collectiv

What If We Get It Right?: Visions of Climate Futures

Mark Moffett

Entomologist, Nature Photographer & Author

Mark Z. Jacobson

Director of the Atmosphere/Energy Program & Professor of Civil and Environmental Engineering at Stanford University

Brian Skerry

National Geographic Magazine Photographer, Specializing in Marine Wildlife & the Underwater World; Exploration & Conservation Speaker

Willie Smits

Trained Forester, Microbiologist, Conservationist, Animal Rights Activist, Wilderness Engineer & Social Entrepreneur

Stefanie Powers

Emmy Award-Nominated Actress & Wildlife Conservationist

Michael Hingson

Author of the #1 NY Times Bestseller book "Thunder dog –The True Story of a Blind Man, a Guide Dog & the Triumph of Trust" and President of The Michael Hingson Group, Inc.

Doug Fine

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

Michael Chang

Retired Tennis Star & International Tennis Hall of Famer; Won the French Open at age 17; Author of "Holding Serve"