Wade Boggs

National Baseball Hall of Famer, 12-Time MLB All-Star & World Series Champion; Wildlife Conservation Activist

Tiger Darrow

Austin Raised Singer Songwriter; Booker T. Washington High School -Dallas & NYU Graduate

Eric Roberts

Actor Known for his Roles in "Runaway Train," "The Dark Knight" and "Heroes"

Quannah Chasinghorse

Indigenous Activist & Model

Quannah ChasingHorse on Representation, Climate Exploitation

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

Tamron Hall

Award-Winning Journalist; Former National News Anchor for NBC News; Host of the "Tamron Hall Show"

Watch Where They Hide

Sophia Bush

Actress, Humanitarian & Author

Christiana Figueres

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

Gary White

CEO & Co-Founder of WaterEquity & Water.org with Matt Damon

Maggie Q

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

Cesar Millan

Host of The Dog Whisperer; Author of Cesar's Way

William McDonough

Renowned Architectural Designer, Advisor & Co-Author of "Cradle to Cradle + The Upcycle"

Alice Waters

Executive Chef, Founder & Owner of Chez Panisse; Sustainable Agriculture Advocate

Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

Adrian Grenier

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

Jillian Michaels

Leading Fitness Expert, Certified Nutritionist, Renowned Life Coach & Powerful Entrepreneur

Sophie Gregoire-Trudeau

Celebrated Mental Health & Gender Equality Advocate; Author of "Closer Together: Knowing Ourselves, Loving Each Other"

Closer Together: Knowing Ourselves, Loving Each Other

Ken Salazar

United States Ambassador to Mexico; Former Secretary of the U.S. Department of the Interior

Amy Smart

Actress, Environmentalist & Co-Founder of Smart House Collections