Ed Begley Jr.

Environmental Activist & Emmy Award-Nominated Actor

Tory Belleci

Television Host & Model Maker; Best Known for "MythBusters"

Tom Chappell

Co-Founder and CEO of Tom's of Maine & Ramblers Way

Aubrey de Grey

Biomedical Gerontologist; Chief Science Officer of SENS Research Foundation; Researcher on Preventing Aging

Doug Fine

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

Peter Gleick

Co-founder & President of the Pacific Institute for Studies in Development, Environment & Security

The Three Ages of Water

Robert Hormats

Vice Chairman of Kissinger Associates Inc.

Maria Popova

Editor of Brain Pickings; Author of "Figuring"

Josh Dorfman

Environmental Entrepreneur; Founder & CEO of Simbly

Melissa Chiu

Museum Director, Asia Society

David Gallo

Director of Special Projects, Woods Hole Oceanographic Institution

Wes Jackson

Founder and Former President of The Land Institute

Edward Burtynsky

World-Renowned Photographer

Mona Eltahawy

Author, Commentator & Disruptor of Patriarchy

Bryan Clay

Co-Founder & Chief Brand Officer at Eat The Frog Fitness; Olympic Gold & Silver Medalist; 3x World & USA Champion

Penelope Boston

Speleologist; Associate Director of the National Cave and Karst Research Institute

Vera Cordeiro

Founder and CEO, Associação Saúde Criança

Cary Fowler

Biodiversity warrior Cary Fowler wants to save the world from agricultural collapse, one seed at a time.

Antonia Juhasz

Leading Energy Analyst, Author & Investigative Journalist Specializing In Oil

Patrick Meier

Founder of Climate Robotics Network; Creator of the Concept of Crisis Mapping

Patrick Meier | TEDxMombasa - Robots vs. Climate Crisis

Paul Goldberger

Architecture Critic, Design Professor & Contributing Editor at Vanity Fair

Abby Joseph Cohen

Advisory Director & Senior Investment Strategist at Goldman Sachs

Louis J. D'Ambrosio

Former CEO Fortune 500 Co's; Senior Advisor to Goldman Sachs; Executive Fellow, Harvard Business School

Jim Hightower

Political Commentator / Progressive Activist / Humorist

Mark Moffett

Entomologist, Nature Photographer & Author

Brian Skerry

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

Roz Savage

First Woman to Solo Row Across the Atlantic, Pacific & Indian Oceans: Environmental & Sustainability Advocate

The Ocean in a Drop: Navigating from Crisis to Consciousness

Marc Koska

Inventor of the K1 syringe and founder of the SafePoint charity

John Francis

John Francis walks the Earth, carrying a message of careful, truly sustainable development and respect for our planet.

Jon Bowermaster

Writer about Adventure, the Environment, and Exotic Corners of the World