Gabriela Cowperthwaite

Director, Writer & Producer; Best Known for the Documentary "Blackfish"

Meg Lowman

National Geographic Explorer & Arbornaut

Bill Nussey

Founder of the Freeing Energy Project; Partner at Tech Square Ventures & Engage

Chris Turner

Author, Sustainability & Global Cleantech Expert

Mark Tercek

Former President & CEO of The Nature Conservancy

John Passacantando

Former Executive Director of Greenpeace USA

Daniel Esty

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

Riddhima Yadav

Climate Strategist & Sustainability Business Leader

Danni Washington

TV Host, Science Communicator, Ocean Explorer & Nature Advocate

Kristen Bell

Actress & Film Producer; Known for "Veronica Mars" & "Frozen"

Dyan deNapoli

Penguin Expert, TED Speaker & Award-Winning Author of "The Great Penguin Rescue"

Dr. Julio Friedmann

Chief Scientist at Carbon Direct & Non-Resident Fellow at the Center on Global Energy Policy at Columbia University SIPA

Edna Odhiambo

Independent Climate Consultant

Pattie Gonia

Queer Environmentalist; Drag Queen Building Community for Queer People, Allies & the Planet

Darin Olien

Co-Host of Netflix "Down To Earth" with Zac Efron, Best-Selling; Original Formulator of "Shakeology;" Healthy Living & Superfoods Expert

Robert Irwin

Wildlife & Nature Conservationist, Photographer, Author, and TV Personality; Son of Steve Irwin, Owner of Australia Zoo

Robert Irwin Reveals His Most Feared Animal! | The Cheap Seats

Charlize Theron

Academy Award-Winning Actress; Best Known for "Monster" & "Mad Max: Fury Road"

Liz Bonnin

Award-Winning Science Expert & Broadcaster; Known for "Blue Planet Live" and "Drowning in Plastic"

Brian Skerry

National Geographic Magazine Photographer, Specializing in Marine Wildlife & the Underwater World; Exploration & Conservation Speaker

Alison Victoria

Interior Designer; Host of HGTV's "Kitchen Crashers"