Robin Chase

Transportation Entrepreneur, Founder & Former CEO of Zipcar; Author of "Peers Inc: How People and Platforms Are Inventing the Collaborative Economy and Reinventing Capitalism"

Alicia Silverstone

Actress & Animal Rights Activist

Tiki Davis

Award-Winning Entrepreneur, Successful Businessman, Oil & Gas Expert, Actor, Author & Survivor

Why Book Tiki Davis

Xiuhtezcatl Martinez

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

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.

Amy Myers Jaffe

Leading Expert on Global Energy Policy & Sustainability

Amy Myers Jaffe: TEDx Energy Policy

Al Gore

45th Vice President of the United States, Nobel Peace Laureate & Bestselling Author

Sarah Kauss

Founder of S'well, Advisor, Investor & Advocate

Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown

Robert Bryce

Energy Expert, Veteran Journalist & Acclaimed Author

Christiana Figueres

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

William McDonough

Renowned Architectural Designer, Advisor & Co-Author of "Cradle to Cradle + The Upcycle"

Mitt Romney

Former Governor of Massachusetts, 2012 Republican Presidential Nominee and CEO

Ian Somerhalder

Actor Known for "The Vampire Diaries"; Animal & Environmental Advocate; Founder of The Ian Somerhalder Foundation

Janet Chung and Ann Chung Mellman

Founders of Korean Delights

Jae Rhim Lee

Artist and TED Fellow Jae Rhim Lee Re-Imagines the Relationships Between the Body and the World

Marla Spivak

Entomologist; Focused on Practical Applications to Protect Honey Bee Populations

Rick Ridgeway

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

David Doubilet

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

Peter Orszag

Economist, Chief Executive Officer of Lazard & Former Director of the Office of Management and Budget in the Obama Administration