Cyrus Wadia

Sustainability Leader & Entrepreneur

Daan Roosegaarde

Artist & Founder of Studio Roosegaarde

Dallas Goldtooth

Keep it in the Ground Organizer for the Indigenous Environmental Network & Co-Founder of the Indigenous Comedy Group

Dan W. Reicher

Executive Director, Center for Energy Policy and Finance Stanford Law School

Daniel Esty

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

Daniel Poneman

President and CEO, Centrus Energy Corporation, Deputy Secretary of Energy (2009-2014) and Senior Fellow at Harvard Kennedy School

Danielle Fong

Entrepreneur & Inventor; Formerly Chief Science Officer and Co-Founder of LightSail Energy, Inc.

Daryl Hannah

Actress, Best Known for "Kill Bill" & "Splash"; Environmental Activist

David Crane

Strategic Advisor Executive at Pegasus Capital Advisors; Former President & CEO of NRG Energy, Inc.; Climate Advocate

David Doubilet

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

David Suzuki

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

David de Rothschild

Environmentalist, Adventurer & Founder of Sculpt the Future Foundation

Denis Hayes

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

Doc Hendley

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

Donald Sadoway

John F. Elliott Professor of Materials Chemistry at MIT; Expert on Electrochemistry & Renewable Energy

Ambri: A Battery that Could Change the World

Doug Fine

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

Dr. Douglas Vakoch

Founder & President of METI—Messaging Extraterrestrial Intelligence

Dr. Joe MacInnis

Physician-Scientist; Titanic and Ocean Explorer; Author of \"Aliens of the Deep\" and \"Breathing Underwater: The Quest to Live in the Sea\"

Dr. John Briffa

Physician, Internationally-Published Author, Speaker & Trainer

Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown