Aaron Naparstek

Founder of Streetsblog, a Website Providing Daily Coverage of Transportation, Land Use & Environmental Issues in New York City

Abiola Valentine

Abiola Valentine is a poet/spoken word artist who uses writing as a means of expressing the realm of human emotions such as love, joy, pain, fear, anger, rejection, and abandonment, in order to foster individual healing and world unity.

Abrahm Lustgarten

Senior Reporter, ProPublica; Author, Run to Failure: BP and the Making of the Deepwater Horizon Disaster

Achenyo Idachaba

Head of MitiMeth, A Nigeria-Based Environmentally Aware Production Company

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

Afra Raymond

Afra Raymond is President of the Joint Consultative Council for the Construction Industry (JCC). Afra is a Chartered Surveyor and Managing Director of Raymond & Pierre Ltd. – www.raymondandpierre.com. The opinions of Afra Raymond are not necessarily held

Aidan Gallagher

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

Aidan Gallagher On 'The Umbrella Academy' and His Music | Seventeen

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

What the Fossil Fuel Industry Doesn't Want You To Know | Al Gore | TED

Alanis Morissette

Alt-Rock Angst Icon Known for "You Oughta Know" & "Ironic"

Alasdair Harris

Ocean Conservationist & Entrepreneur

Alex Chadwick

Host and Senior Correspondent , BURN

Alex Steffen

Author of "Carbon Zero: Imagining Cities That Can Save the Planet"

Alexander A. Likhotal

President of Green Cross International & Former Adviser to Mikhail Gorbachev

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Alexandra Palt

Chief Corporate Responsibility Officer & CEO of the Fondation L’Oréal

Alexandria Villaseñor

Climate Justice Activist & Fridays4Future Organizer; Founder of Earth Uprising

Alexandra Villaseñor | Celebrate Earth Month | Disney Channel

Alexei Arbatov

Academician and professor of the Academy of Defense, Security and Police by the President of Russia and Vice chairman of the YABLOKO party

Alexey Malashenko

The co-chair of the Carnegie Moscow Center’s Religion, Society and Security Program