John Browne

Founder and Chairman of BeyondNetZero; Former CEO of BP & Author of "The Glass Closet: Why Coming Out Is Good Business"

Shel Horowitz

Green Guerrilla Marketer, National Environmental Hall of Fame, Social Activist, and Author

Michael Shellenberger

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

Andrew Youn

Senior Partner, Executive Director, & Co-Founder at One Acre Fund, Anti-Hunger Activist

Michael Metcalfe

Financial Expert and Commentator

Ingrid Vanderveldt

Chief Executive Officer at Green Girl Energy; Chief Executive Officer and Owner at Ingrid Vanderveldt LLC. Ms. Vanderveldt serves as Managing Director and Owner of VH2 Energy Investments LLC

Roger Doiron

Founder of Kitchen Gardeners International, a network of home gardeners.

Britta Riley

Founder of Windowfarms.org

Johan Rockström

Redefining Sustainable Development

Vani Hari

Food Activist & Blogger

Food Babe Family: More Than 100 Recipes and Foolproof Strategies to Help Your Kids Fall...

Marty Metro

Founder & CEO of UsedCardboardBoxes and UCBZeroWaste

Sarah Kauss

Advisor, Investor & Advocate; Founder & Former CEO of S'well; Henry Crown Fellow at The Aspen Institute; Consumer Products Leader

Ep. 562 w/ Sarah Kauss Board Member, Compensation Committee Chair

Shailene Woodley

Environmental Activist & Actress Known for "Divergent"

Chris Bashinelli

National Geographic Explorer & TV Host; United Nations Moderator; Arab-American Diversity Speaker; Expert on Human Connection & Humanity in Business

Alex Laskey

Founder and Former President at OPOWER

David Keith

Professor and Founding Faculty Director of the Climate Systems Engineering Initiative at the University of Chicago

Bill Ford

Executive Chair of the Ford Motor Company

Zoë Kravitz

Actress & Director Known for "Blink Twice," "Mad Max: Fury Road" & "The Batman"; Frontwoman of Lolawolf; Racial Equality, Body Positivity & Sustainability Advocate

Darren Aronofsky

Filmmaker & Director Known for "Black Swan" & "The Wrestler"

David Jones

Young Global Leader, Former Global CEO of Havas, Co-founder of One Young World