Dr. Nick "Ranger Nick" Fuhrman

Josiah Meigs Professor of Environmental Education & Nature TV Host

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.

Jonathan Trent

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

Marla Spivak

Entomologist; Focused on Practical Applications to Protect Honey Bee Populations

Harvey Wasserman

Journalist, Author, Democracy Activist & Advocate for Renewable Energy

Penny Chisholm

Award-Winning Oceanographer & Professor, MIT

Professor Penny Chisholm on Earth Week

Daniel Esty

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

Bob Kopp

Climate Scientist, Geobiologist & Climate Policy Scholar at Rutgers University

Achim Steiner

Director of the Oxford Martin School; Former Executive Director of the United Nations Environment Programme

Chris Lane

CEO, Aspen Center for Environmental Studies

Michael Shellenberger

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

George Elvin

Green Innovation Speaker & Author

Sophia Kianni

Climate Activist & Founder of Climate Cardinals

Marcelo Mena Carrasco

Former Environment Minister of Chile

Tim Flannery

Environmentalist, Explorer & Author

Cameron Hepburn

Professor of Environmental Economics & Director of the Smith School of Enterprise & the Environment at the University of Oxford

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. Anthony Leiserowitz, Ph.D.

Director of Program on Climate Change Communication; Senior Research Scientist of Forestry & Environmental Studies at Yale University

Dr. Sylvia Hood Washington

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

Kartik Chandran

Environmental Engineer & Professor at Columbia University

Andrew Hoffman

Holcim (US) Professor of Sustainable Enterprise at the University of Michigan

Tundi Agardy

Marine Conservationist & Founder of "Sound Seas," Research and Policy Project to Help Protect the Oceans and Ocean Life

Tristram Stuart

Environmental Campaigner, Author & Businessman

Mitch Resnick

Mitchel Resnick is LEGO Papert Professor of Learning Research, Director of the Okawa Center, and Director of the Lifelong Kindergarten group at the MIT Media Lab.

Christiana Figueres

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

Mark Tercek

Former President & CEO of The Nature Conservancy

Chad Pregracke

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

Dr. Julio Friedmann

Chief Scientist at Carbon Direct & Non-Resident Fellow at the Center on Global Energy Policy at Columbia University SIPA

Neeshad Shafi

Sustainability Futurist, Social Change Advocate & Expert on Climate Policy in the Middle East; Founder of Arab Youth Climate Movement Qatar