Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

Natalie Kyriacou OAM

Environmental + Social Impact Leader, Australian Top Innovator & Australia’s Top ‘Green’ Voice

Bill Nussey

Founder of the Freeing Energy Project; Partner at Tech Square Ventures & Engage

Sharona Shnayder

Environmental Activist & Founder of Tuesdays for Trash

Kehkashan Basu

Forbes 30 under 30, United Nations Human Rights Champion, National Geographic Young Explorer & Founder-President of Green Hope Foundation

Kimi Werner

Freedive-Spearfishing Champion, Certified Chef & Award-Winning Environmentalist

Tim Flannery

Environmentalist, Explorer & Author

Tundi Agardy

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

Katharine Hayhoe

Atmospheric Scientist, Professor of Political Science & Director of Climate Science Center at Texas Tech, Lead Scientist with The Nature Conservancy

Saving Us: A Climate Scientist's Case for Hope and Healing in a Divided World

Bindi Irwin

Wildlife Conservationist & Daughter of Steve Irwin; Season 21 Contestant on "Dancing With the Stars"

Joel K. Bourne Jr.

Author, Award-Winning Journalist & Consultant for Documentary Films & TV

Tom Rand

Entrepreneur, Venture Capitalist & Author

Louie Psihoyos

Photographer & Documentary Film Director Known for the Academy Award-Winning Documentary "The Cove"

Paul Snelgrove

Paul Snelgrove led the group that pulled together the findings of the Census of Marine Life -- synthesizing 10 years and 540 expeditions into a book of wonders.

David Trimble

Director of Natural Resources and Environment at the Government Accountability Office.

Gary Hirshberg

Co-Founder & Chief Organic Optimist of Stonyfield Farm

Mark Z. Jacobson

Director of the Atmosphere/Energy Program & Professor of Civil and Environmental Engineering at Stanford University

Raj Patel

Award-Winning Writer, Food Politics Activist, Filmmaker & Academic

Louie Schwartzberg

Award-Winning Cinematographer, Director, Photographer and Filmmaker

Joseph P. Kennedy II

Former Member of the U.S. House of Representatives & Founder of Citizens Energy Corporation

Graham Hill

Founder of Life Edited & TreeHugger.com

Chris Turner

Author, Sustainability & Global Cleantech Expert

Andrew Winston

Sustainability Expert; Author of "Green to Gold" & Co-author of “Net Positive"

Laurie David

Producer, Activist Author,The Family Dinner: Great Ways To Connect With Your Kids One Meal At A Time

Tim Sanders

Bestselling Author, Technology Pioneer, Expert on Collaboration & Relationships

Bill Nye

"The Science Guy"; Science Communicator, TV Presenter & Mechanical Engineer; Climate Change Activist

Jamais Cascio

Author, Founder of Open The Future, Co-founder of WorldChanging.com, Specialist in Emerging Technologies, Environmental Dilemmas, and Cultural Transformation

Sir Richard Branson

Businessman & Founder of Virgin Group

Mark Bittman

Former NYT Writer; Author of "How to Cook Everything" Series; Host of "Food with Mark Bittman"

Dr. Julio Friedmann

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