Christian Serratos

Actress, Best-known for her Role in the "The Twilight Saga" Series & "The Walking Dead"

Christiana Figueres

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

Christine Ervin

Former US Assistant Secretary of Energy; National Leader on Green Buildings & Clean Energy

Corey Feldman

Actor Known for Movies Like "The Goonies" and "Stand By Me"

Cornelia Guest

Cornelia Guest is daughter of American fashion icon CZ Guest and polo champion Winston Frederick Churchill Guest, she's a New York socialite, author, businesswoman, and philanthropist.

Danielle Brigida

Passionate about using technology to protect wildlife.

Danny Trejo

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

David Burwell

Director of the Energy and Climate Program at the Carnegie Endowment

David Haskell

Biologist and Author; Finalist for the 2013 Pulitzer Prize

David Life

Yoga Master; Co-Founder, Jivamukti Yoga

David Mizejewski

National Wildlife Federation Naturalist & Media Personality

Denise Herzing

Research Director & Founder of the Wild Dolphin Project; Author of "Dolphin Diaries"

Denise Richards

Actress, Former Fashion Model & Reality Star on Bravo's "The Real Housewives of Beverly Hills"

Dennis Dimick

Former Executive Environment Editor at National Geographic Magazine

Diana Reiss

A professor of psychology at Hunter College and in the graduate program of Biopsychology and Behavioral Neuroscience of the City University of New York.

Dominic Monaghan

Actor Best Known for Lost & The Lord of the Rings; Host of Wild Things on BBC America

Dominic Monaghan Returns To “Moriarty” | New York Live TV

Donald Shultz

Donald Schultz is a South African herpetologist who travels the world getting samples from dangerous species. Schultz is on a show on Animal Planet called Wild Recon.

Dr. Mark Plotkin

Renowned Ethnobotanist and Plant Explorer in the Neotropics, Author of "Tales of a Shamans' Apprentice"

Dr. Tierney Thys

Marine Biologist, Educator & Filmmaker

Ed Osann

Senior Policy Analyst, Water Program