Erin Brockovich

Consumer Advocate, Author, TV Host & Environmental Activist

Robert Ballard

Renowned Ocean Explorer & Scientist

Jack Hanna

Naturalist, Adventurer & Director Emeritus of the Columbus Zoo

Doc Hendley

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

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Sebastian Copeland

Adventurer, Environmental Activist, Award-Winning Photographer, Author, Lecturer & Founder of the Sedna Foundation

Shaun Tomson

Former World Champion Surfer, Environmentalist & Motivational Speaker

Daniel Esty

Hillhouse Professor of Environmental Law and Policy at Yale Law School, Corporate Environmental Strategy Expert & Co-Author of "Green to Gold"

Alan Cumming

Emmy-Winning Actor Who Stars in "The Good Wife"

Danny Trejo

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

Ashley Madekwe

Actress & Personal Style Blogger ; Best known for her role on ABC's "Revenge"

Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Carl Safina

Ecologist & Writer

Simon Lovell

English Comedy Magician, Card Shark Actor and Con Man

Dr. Jan Pol

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

Michael Shellenberger

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

Tony Juniper

Writer, Sustainability Advisor, & Environmentalist

Sylvia Acevedo

Engineer, Rocket Scientist & Technology Leader; Inspirational Speaker; Corporate Director at Qualcomm; Former CEO of Girl Scouts USA

How Sylvia Acevedo Defied Barriers to Become Girl Scout CEO