Jarod Miller

Naturalist, Zoologist & Television Host

Ed Begley Jr.

Environmental Activist & Emmy Award-Nominated Actor

Jack Hanna

Naturalist, Adventurer & Director Emeritus of the Columbus Zoo

Peter B. de Menocal

President & Director of Woods Hole Oceanographic Institution; Professor, Department of Earth and Environmental Sciences Columbia University

Peter de Menocal on Ocean Solutions for a Warming Planet

Brian Hare

Co-founder of Dognition & Associate Professor of Evolutionary Anthropology at Duke University, Author of "The Genius of Dogs"

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Vandana Shiva

World-Renowned Environmental Leader

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Doug Fine

Globe-Trotting Journalist, Award-Winning Climate Correspondent, Goat-Herder & Author

John Passacantando

Former Executive Director of Greenpeace USA

Karen Litzinger

Business etiquette trainer/keynote and career coach with a side passion as a pet loss counselor and author

Jason Biggs

Actor Known For His Roles in the "American Pie" Series and on "Orange Is The New Black" Among Others

Sarah Brosnan

Primatologist; Professor of Psychology, Philosophy & Neuroscience at Georgia State University

Jeff Orlowski-Yang

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

Danny Trejo

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

Sophia Bush

Actress, Humanitarian & Author

Maggie Q

TV & Film Actress, Known for Lead Role in CW's "Nikita"

Doc Hendley

Global Humanitarian, Clean Water Crusader, Top 10 CNN Hero, Sustainability Advocate

Winona LaDuke

Executive Director of Honor the Earth

Adrian Grenier

Actor Known for HBO's "Entourage"; Environmental Activist; UN Ambassador