Darren Aronofsky

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

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

Bindi Irwin

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

Tensie Whelan

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

Bruno Sánchez-Andrade Nuño

PhD, Data Scientist at World Bank Group, Young Global Leader

Nash Grier

Social Media Guru, Digital Influencer & Environmental Activist

Joel K. Bourne Jr.

Author, Award-Winning Journalist & Consultant for Documentary Films & TV

Cassandra Moseley

Director of the Ecosystem Workforce Program in the Institute for a Sustainable Environment at the University of Oregon

Stephen J. Pyne

Senior Sustainability Scientist, Global Institute of Sustainability, and Regents' Professor, School of Life Sciences, at Arizona State University

Ned Gardiner

Visualization Manager, Climate Program Office, National Oceanic and Atmospheric Administration

Tom Rand

Entrepreneur, Venture Capitalist & Author

Renat Heuberger

Chief Executive Officer & Deputy Chairman, South Pole Carbon

Naomi Oreskes

Geologist & Earth Science Historian

Dickon Pinner

Senior Partner & Leader of the Resource Productivity Practice at McKinsey & Company; Sustainability Activist

Steve Goreham

Engineer, Author & Authority on Environmental and Energy Issues

Angélique Kidjo

UNICEF Goodwill Ambassador, Singer & Songwriter

Laura Stachel, M.D., M.P.H

Co-Founder of WE CARE Solar, a Company that Fights to Combat High Maternal Mortality Rates in Developing Countries

Dennis Dimick

Former Executive Environment Editor at National Geographic Magazine

Bruce Nilles

Founder of Sierra Club’s Beyond Coal Campaign; Expert on Carbon Pollution

David Trimble

Director of Natural Resources and Environment at the Government Accountability Office.

Joan Baez

Legendary Folk Musician & Human Rights Activist

Pierce Brosnan

Actor, Producer & Activist; Best Known for His Role as James Bond

Matt Damon

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

Alanis Morissette

Alt-Rock Angst Icon Known for "You Oughta Know" & "Ironic"

Will Steger

Arctic explorer and tv personality

Heidi Cullen

Communications Director for Monterrey Bay Aquarium Research Institute; Climate Scientist

Mark Z. Jacobson

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

Jason Clay

Senior Vice President of Food & Markets at WWF

Rob Harmon

President and CEO of EnergyRM

Arnold Schwarzenegger

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