Katie Spotz

World Record-Breaking Endurance Athlete & Safe Water Activist

Ann McElhinney

Documentary Filmmaker Known For "FrackNation," "Not Evil Just Wrong" & "Mine Your Own Business"

Steve Goreham

Engineer, Author & Authority on Environmental and Energy Issues

Chad Pregracke

Founder of Living Lands & Waters, CNN's Hero of the Year for 2013, Environmental Speaker & Bestselling Author

Jigar Shah

Director at the Department of Energy's Loan Programs Office & Co-Founder of Generate Capital

John Passacantando

Former Executive Director of Greenpeace USA

Andrew Hoffman

Holcim (US) Professor of Sustainable Enterprise at the University of Michigan

Ron Pernick

Co-Founder & Managing Director of Clean Edge, Inc.

Frans Lanting

Wildlife Photographer

Christopher C. Horner

Former Senior Fellow at the Competitive Enterprise Institute, Attorney & Climate Change Denial Activist

Harvey Wasserman

Journalist, Author, Democracy Activist & Advocate for Renewable Energy

Shel Horowitz

Green Guerrilla Marketer, National Environmental Hall of Fame, Social Activist, and Author

James Barbour

Press Secretary at the British Embassy, Washington DC, and Head of Communications for the UK Government across the United States

Joe Hanson

Science Writer, Biologist, Video Producer & Educator

Naomi Oreskes

Geologist & Earth Science Historian

Pat Wood

CEO of the Hunt Energy Network; Former Chairman of the Federal Energy Regulatory Commission

Robert Swan

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

Khalida Brohi

Indigenous Entrepreneur, Author, Storyteller & Women's Empowerment Speaker

Tim Jackson

Ecological Economist, Playwright & Director of the Centre for the Understanding of Sustainable Prosperity

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