Achenyo Idachaba

Founder & CEO of MitiMeth, a Materials and Artisan Enterprise based in Nigeria

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Adam Beck

Executive Director, Smart Cities Council Australia & New Zealand

Adam James

Co-Founder of Clean Energy Leadership Institute; Authority on Renewable Energy & Public Policy

Adam Lowry

Co-Founder & Co-CEO of Ripple Foods; Co-Founder of Method Products; Champion of Sustainability & Eco-Friendly Living

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Adam Werbach

Global CEO Saatchi & Saatchi S

Adrian Grenier

Actor; Environmental Activist, UN Ambassador; Social Impact Entrepreneur & Founder of Lonely Whale Foundation

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Adrian Lipscombe

Award-Winning Chef; City Planner & Architect; Founder of 40 Acres Project & Muloma Heritage Center

Ahmed Hassan

Celebrity Landscaper & TV Host of DIY's Yard Crashers, Blog Cabin, Turf War

Aidan Gallagher

Actor, Musician & UN Environment Goodwill Program Ambassador; Known for "The Umbrella Academy"

Aimee Christensen

Sustainability Advisor; Founder & CEO of Christensen Global Strategies

Aimee Witteman

Deputy Assistant Secretary for Intergovernmental Affairs at U.S. Department of Energy

Al Gore

45th Vice President of the United States, Nobel Peace Laureate & Bestselling Author

Alan Greene

Practicing Physician, Author, Health Techie, Futurist, Foodie, Green Pediatrician

Alan Hanson

Executive Vice President, Technologies and Used Fuel Management AREVA NC Inc.

Alan Salzman

CEO and Managing Partner VantagePoint Capital Partners

Alanis Morissette

Mental Health & Eating Disorder Advocate; Grammy-Winning Alt-Rock Angst Singer-Songwriter; Known for "You Oughta Know" & "Ironic"

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Alessandro Vitale

Urban Gardner & Sustainability Advocate; Author of "Low Waste Kitchen" & "Rebel Gardening"

Inspiring Story of Alessandro Vitale (Spicy Moustache)

Alex Honnold

"Free Solo" Professional Rock Climber, Environmental Advocate & Host of the "Climbing Gold" Podcast

My Favorite Rock Climber - Alex Honnold | Tosh Show

Alex Schulze

Co-Founder & CEO of 4ocean; Advocate for Ocean Cleanup, Conservation & Sustainability

Alexandra Cousteau

Environmental Activist, Ocean Advocate & Storyteller; Co-Founder, Oceans2050 & Senior Advisor, OCEANA