David Doubilet

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

Louie Psihoyos

Photographer & Documentary Film Director Known for the Academy Award-Winning Documentary "The Cove"

Jason Clay

Senior Vice President of Food & Markets at WWF

Chad Pregracke

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

Tensie Whelan

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

Tristram Stuart

Environmental Campaigner, Author & Businessman

Mark Tercek

Former President & CEO of The Nature Conservancy

Denis Hayes

Organizer of the First Earth Day; CEO of The Bullitt Foundation

John Passacantando

Former Executive Director of Greenpeace USA

Sebastian Copeland

Adventurer, Environmental Activist, Award-Winning Photographer, Author, Lecturer & Founder of the Sedna Foundation

Doug Fine

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

Ed Begley Jr.

Environmental Activist & Emmy Award-Nominated Actor

Cristina Mittermeier

Photographer, Adventurer & Co-Founder of SeaLegacy

Natalie Kyriacou OAM

Environmental + Social Impact Leader, Australian Top Innovator & Australia’s Top ‘Green’ Voice

Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown

Jonathan Trent

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

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

Doc Hendley

Global Humanitarian, Clean Water Crusader, Top 10 CNN Hero, Sustainability Advocate

Joan Michelson

Co-Host of the Electric Ladies Podcast, ESG Consultant, Business Sustainability & Leadership Expert

Bill Nussey

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

Amali Tower

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

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

Jamie Margolin

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

Danni Washington

TV Host, Science Communicator, Ocean Explorer & Nature Advocate

Kate Brandt

Lead for Sustainability at Google & Former Chief Sustainability Officer for the Obama Administration

Nick Jans

Nature Writer & Photographer; Bestselling Author of "A Wolf Called Romeo"

Harvey Wasserman

Journalist, Author, Democracy Activist & Advocate for Renewable Energy

Brian Skerry

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

Dyan deNapoli

Penguin Expert, TED Speaker & Award-Winning Author of "The Great Penguin Rescue"

Jake Norton

World-Renowned Climber, Photographer & Humanitarian