Xiuhtezcatl Martinez

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

Matt Damon

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

Jamie Margolin

Climate Change Activist; Author; Founder & Co-Executive Director of Youth-Led Climate Action Group "Zero Hour"

Mark Tercek

Former President & CEO of The Nature Conservancy

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

David Suzuki

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

Winona LaDuke

Executive Director of Honor the Earth

Amali Tower

Climate Displacement, Migration & Refugee Expert; Founder of Climate Refugees

Q&A: Amali Tower on Climate Migration and 'Evolution Earth'

Dr. Sylvia Hood Washington

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

Kartik Chandran

Environmental Engineer & Professor at Columbia University

Michael Shellenberger

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

Jeff Orlowski-Yang

Award-winning Filmmaker, Photographer, Entrepreneur & Climate Change Activist

Tristram Stuart

Environmental Campaigner, Author & Businessman

Christiana Figueres

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

Rick Ridgeway

Environmentalist, Mountaineer, Expedition Author, Former VP of Environmental Initiatives & Special Projects at Patagonia

Daniel Pauly

Daniel Pauly is the principal investigator at the Sea Around Us Project, which studies the impact of the world's fisheries on marine ecosystems. The software he's helped develop is used around the world to model and track the ocean.

Harvey Wasserman

Journalist, Author, Democracy Activist & Advocate for Renewable Energy

Chad Pregracke

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

Doug Fine

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

Daniel Esty

Hillhouse Professor of Environmental Law and Policy at Yale Law School, Corporate Environmental Strategy Expert & Co-Author of "Green to Gold"

Erin Brockovich

Consumer Advocate, Author, TV Host & Environmental Activist

Bill Nussey

Founder of the Freeing Energy Project; Partner at Tech Square Ventures & Engage

Sharona Shnayder

Environmental Activist & Founder of Tuesdays for Trash

Dana Ellis Hunnes

Author of "Recipe For Survival"

Sophia Kianni

Climate Activist & Founder of Climate Cardinals

Kehkashan Basu

Forbes 30 under 30, United Nations Human Rights Champion, National Geographic Young Explorer & Founder-President of Green Hope Foundation

Tim Flannery

Environmentalist, Explorer & Author

Bob Kopp

Climate Scientist, Geobiologist & Climate Policy Scholar at Rutgers University

Tony Juniper

Writer, Sustainability Advisor, & Environmentalist

Tensie Whelan

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