Aaron Naparstek

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

Adam James

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

Aditi Mayer

Keynote Speaker on Sustainability, Fashion, Environment & Social Justice

Adrian Grenier

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

Agam Pandit

Director of Operations and Managing Partner at ADC Energy, Inc., Entrepreneur & Philanthropist

Aimee Witteman

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

Aldo Kane

World Record Setting Adventurer; Fellow at the Royal Geographic Society, Author & TV Presenter

Alejandro Durán

Artist Who Collects Trash From the Oceans and Turns It Into Disquieting Works of Art

Alex Dehgan

CEO & Co-Founder of Conservation X Labs

Alex Schulze

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

Conversation with Alex Schulze, CEO and Co-Founder of 4ocean

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Alice Hill

Research Fellow, Hoover Institution; Former White House Special Assistant to the President

Alice Waters

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

Alicia Silverstone

Actress & Animal Rights Activist

Alison Killing

Architect and Urban Designer

Alison Sudol

Singer-Songwriter, Musician, Actress & Video Director

Alison Sudol - Come On Baby [Official Video]

Amali Tower

Climate Displacement, Migration & Refugee Expert; Founder of Climate Refugees

Q&A: Amali Tower on Climate Migration and 'Evolution Earth'

Amber Jenkins

Applied Science Engineer, NASA’s Jet Propulsion Laboratory; Editor, NASA Climate Change Website

Amy Francetic

Managing General Partner at Buoyant Ventures

Amy Harder

Climate Change Journalist & Executive Editor of Cipher by Breakthrough Energy