Lamman Rucker

Actor, Education Activist, Green Living Advocate & Entrepreneur

Amber Jenkins

Applied Science Engineer, NASA’s Jet Propulsion Laboratory; Editor, NASA Climate Change Website

James E. Hansen

Adjunct Professor Directing the Program on Climate Science, Awareness and Solutions of the Earth Institute at Columbia University; Former Director at NASA Goddard Institute for Space Studies

Roselinde Torres

Senior Partner and Managing Director at the consulting firm, BCG.

Gary Snyder

Poet, Essayist, Lecturer and Environmental Activist

Tensie Whelan

Director of NYU's Center for Sustainable Business; Former President of the Rainforest Alliance

Tensie Whelan On Sustainable Enterprise in the Private Sector

Winona LaDuke

Executive Director of Honor the Earth

Jason Clay

Senior Vice President of Food & Markets at WWF

Louie Schwartzberg

Award-Winning Cinematographer, Director, Photographer and Filmmaker

Jenna Marbles

YouTube Sensation

Bill Richardson

Former Governor of New Mexico; Former U.S. Energy Secretary

Melissa Rivers

Actress, Television Host & Producer, Equestrienne, and Philanthropist; Daughter of Late Comedian Joan Rivers

Sophia Bush

Actress, Humanitarian & Author

Tim Gunn

Fashion Icon, Former Co-Host & Mentor of "Project Runway"

Ian Somerhalder

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

Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

The Future in 2050 with Dr. Michio Kaku & Alex Klokus | #

Hilary Swank

Academy Award-Winning Actress; Best known for her roles in 'Million Dollar Baby' and 'Boys Don't Cry'