Erin Brockovich

Consumer Advocate, Author, TV Host & Environmental Activist

Adrian Grenier

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

Ed Begley Jr.

Environmental Activist & Emmy Award-Nominated Actor

Ellen DeGeneres

Award-Winning Comedian, TV Host, Actress & LGBTQ Activist

Mark Bittman

Former NYT Writer; Author of "How to Cook Everything" Series; Host of "Food with Mark Bittman"

Amanda Beard

Olympic Gold Medalist, Co-Founder of Beard Swim Co. & Author of New York Times Bestseller "In the Water They Can't See You Cry"

Jack Hanna

Naturalist, Adventurer & Director Emeritus of the Columbus Zoo

Sylvia Earle

Explorer-in-Residence at National Geographic & Oceanographer; Former Chief Scientist of the NOAA

Doug Fine

Bestselling Author & Award-Winning Documentary Film Director; Food Security Advocate, Regenerative Hemp Farmer & Solar-Powered Goat Herder

PBS Newsmakers - American Hemp Farmer Film Discussion

Glenn Close

Actress & Advocate

Peter Gleick

Co-founder & President of the Pacific Institute for Studies in Development, Environment & Security

The Three Ages of Water

Charlize Theron

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

Laura Dern

Actress, Director, Producer & Activist

Daniel Esty

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

Michael Chang

Retired Tennis Star & International Tennis Hall of Famer; Won the French Open at age 17; Author of "Holding Serve"

Jim Breyer

Founder & CEO of Breyer Capital

Edie Falco

Actress, Known for "The Sopranos" & "Nurse Jackie"

Carrie Ann Inaba

"Dancing with the Stars" Judge, Founder of Carrie Ann Inaba Animal Project

Kristen Bell

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

David Duchovny

Actor, Writer & Director Known for "The X-Files," "Aquarius" & "Californication"