Richard Wrangham

Primatologist, Harvard

Tony Juniper

Writer, Sustainability Advisor, & Environmentalist

Vani Hari

Food Activist & Blogger

Rebecca D. Costa

Sociobiologist & Author of The Watchman's Rattle

Joel Sartore

National Geographic Photographer & Author

Rachel Armstrong

Designer, Scientist and Sustainability Innovator

Greg LeMond

Former Professional Cyclist; 3-Time Tour de France Champion & U.S. Bicycling Hall of Famer, Entrepreneur & Anti-Doping Advocate

Sandra Taylor

CEO of Sustainable Business International; ESG/Sustainability Expert & Author

Andy Berman

Andy Berman is co-founder of FLIPSWAP Inc, a pioneer in the incentive driven reuse of mobile phones.

Robert Swan

Polar Explorer & Environmentalist; First Man Ever to Walk Unsupported to Both Poles

Mayor Ray Nagin

Former Mayor of New Orleans

David Crane

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

Ray Suarez

Author, Lecturer, Reporter & Former Host of Al Jazeera America's "Inside Story"

Jeffrey Wigand

Tobacco Control & Ethics Crusader

Ric O'Barry

Wildlife Activist, Author & Founder of the Dolphin Project; Star of the Academy Award-Winning Documentary "The Cove"

Bill Weir

CNN Anchor, Chief Climate Correspondent, Former Host & Executive Producer of the Acclaimed CNN Original Series "The Wonder List with Bill Weir"

Life as We Know It (Can Be): Stories of People, Climate, and Hope in a Changing World

Fatih Birol

Executive Director of the International Energy Agency

Catherine Bell

Actress; Best Known for "The Good Witch" & "Army Wives"

Julie Guthman

Author & Professor of Social Sciences at the University of California, Santa Cruz

Moises Naim

Distinguished Fellow at the Carnegie Endowment for International Peace

Paul Hawken

Activist, Author, Journalist, & Founder of Project Drawdown

Cornelia Guest

Cornelia Guest is daughter of American fashion icon CZ Guest and polo champion Winston Frederick Churchill Guest, she's a New York socialite, author, businesswoman, and philanthropist.

Les Stroud

Star of "Survivorman", Producer, Author, Filmmaker & Activist

Gabe Klein

Entrepreneur; Author; Former Commissioner of the Chicago & Washington D.C. Departments of Transportation

Alexis Madrigal

Senior Editor at The Atlantic & Author of "Powering the Dream: The History and Promise of Green Technology"

Richard Cizik

Lobbyist and Media Spokesman

Peter Duncan

Executive Chairman and Founder of MicroSeismic, Inc

Marvelless Mark

CEO of Millennia Productions, Best Selling Author of "Opportunity Rocks"

Opportunity Rocks! Be a Rock Star in Business and Beyond

Paul Dickinson

Sustainability Expert & Executive Chairman of The Carbon Disclosure Project

Cara Mertes

Director, Sundance Institute