Alexandra Horowitz

Professor of Psychology, Animal Behavior, and Canine Cognition; Bestselling Author of "Inside of a Dog: What Dogs See, Smell and Know"

Selenis Leyva

Cuban-American Actress Known for Her Role as Gloria in "Orange is the New Black"

Michael Shellenberger

Founder & President of Environmental Progress; Expert on Energy, Climate, Security, Human Development and Politics

Jeff Orlowski-Yang

Award-winning Filmmaker, Photographer, Entrepreneur & Climate Change Activist

Ric O'Barry

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

Dr. Jan Pol

Veterinarian; Star of Nat Geo Wild's "The Incredible Dr. Pol"

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"

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

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.

Amy Dickman

Animal Conservationist & Wildlife Ecologist

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"

Ayana Elizabeth Johnson

Marine Biologist, Conservation Strategist, Founder & CEO of Ocean Collectiv

What If We Get It Right?: Visions of Climate Futures

Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown