Aadith Moorthy

Founder & CEO at Boomitra; Founder of ConserWater Technologies

Achenyo Idachaba

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

MitiMeth | Turning an invasive weed into beautiful woven objects

Achim Steiner

Director of the Oxford Martin School; Former Executive Director of the United Nations Environment Programme

Adam James

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

Adam Rauwerdink

Innovative Engineer in the Manufacturing Industry; Sustainable Production Advocate; Senior Vice President of Business Development at Boston Metal

Adam Wang-Levine

Deputy Assistant Secretary, Climate, Environment & Infrastructure at the United States Department of the Treasury

Adele Morris

Fellow and policy director for Climate and Energy Economics at the Brookings Institution

Adria Vasil

Author of Ecoholic, Leading Environmental Columnist.

Adrian Grenier

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

Adrian Grenier - UN Environment Goodwill Ambassador, World ...

Afra Majid Alowais

Chief Efficienology Officer, SEWA

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

Alanis Morissette

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

Alanis Morissette Talks 'Jagged Little Pill' and Joan Jett

Alasdair Harris

Ocean Conservationist & Entrepreneur

Alastair Sweeny

Alastair Sweeny is a business historian and futurist based in Ottawa, Canada.

Aldyen Donnelly

Co-Founder & Director of Carbon Economics at Nori

Alec Manfre

CEO and Co-founder at Bractlet

Alex Epstein

Founder of the Center for Industrial Progress; Author of "Fossil Future: Why Global Human Flourishing Requires More Oil, Coal, and Natural Gas - Not Less"

Alex Nowrasteh

Alex's op-eds have appeared in The Wall Street Journal, The Houston Chronicle, The Boston Globe, Investor's Business Daily, and numerous other newspapers.

Alexander A. Likhotal

President of Green Cross International & Former Adviser to Mikhail Gorbachev