Wallace J. Nichols

Scientist, Activist & Author Who Will Change the Way You Think About Water

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

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

Boyd Varty

Author of "Cathedral of the Wild," Speaker & Conservationist at Londolozi Game Reserve

Jim O'Heir

Actor Starring in the NBC Comedy Series "Parks and Recreation"

Tensie Whelan

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

Andy B. Casagrande

National Geographic Cameraman

Ramez Naam

Computer Scientist, Science Fiction Author & Co-Chair of Energy & Environment at Singularity University

Ramez Naam - Exponential Innovation | SingularityU Thailand Summit

Marla Spivak

Entomologist; Focused on Practical Applications to Protect Honey Bee Populations

Danny Trejo

Actor, Author, Activist & Restaurateur; Recovery & Intervention Counselor for Troubled Youth

Sonja Morgan

As the break out star and the woman everyone would most want as a friend on Bravo’s “Real Housewives of NYC,” Sonja Tremont-Morgan represents “housewife” in every sense of the word.

Andrés Ruzo

Geothermal Scientist & Amazon Conservationist

Amy Dickman

Animal Conservationist & Wildlife Ecologist

Tamron Hall

Award-Winning Journalist; Former National News Anchor for NBC News; Host of the "Tamron Hall Show"

Watch Where They Hide

Lisa Vanderpump

Entrepreneur, TV Personality, Author & Philanthropist

Lisa Vanderpump Tells Us About Her First Times

Sophia Bush

Actress, Humanitarian & Author

Christiana Figueres

Expert on Global Climate Change; Former Executive Secretary of the UN Framework Convention on Climate Change

Annie Griffiths

Award-Winning Photographer for National Geographic

Bob Langert

Senior Sustainability Associate, The Context Network Editor at Large for GreenBiz & Author of "The Battle To Do Good: Inside McDonald's Sustainability Journey"

Michael Nichols

Journalist, Photographer & Founder of the LOOK3 Festival of the Photograph