Achenyo Idachaba

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

MitiMeth | Turning an invasive weed into beautiful woven objects

Adam Lowry

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

The Method Method: Seven Obsessions That Helped Our Scrappy Start-up Turn an Industry U...

Adam Ostrow

Chief Digital Officer, TEGNA

Adam Werbach

Global CEO Saatchi & Saatchi S

Adria Vasil

Author of Ecoholic, Leading Environmental Columnist.

Alan Weisman

Journalist / Author

Alastair Parvin

Co-Founder of WikiHouse Foundation; Designer & Civic Entrepreneur

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 Jacobs

Director of Research, Keystone Accountability

Alex Laskey

Founder and Former President at OPOWER

Alex Matthiessen

President, Riverkeeper

Alex Nicholls

Lecturer in Social Entrepreneurship, Skoll Centre for Social Entrepreneurship

Alexander A. Likhotal

President of Green Cross International & Former Adviser to Mikhail Gorbachev

Alexandra Paul

"Baywatch" and Lifetime movie star, television host, activist and environmentalist

Alexis Madrigal

Senior Editor at The Atlantic & Author of "Powering the Dream: The History and Promise of Green Technology"

Allan Savory

Grassland Ecosystem Pioneer

Alysia Reiner

Actress Best Known for "Orange Is the New Black;" Women's Empowerment Speaker & Environmental Activist

Amanda Palmer

Musician, New York Times Best Selling Author, Performer and Provocateur

Ambassador Munir Akram

Former Permanent Representative to the UN from Pakistan

Ambrosius Ruwindrijarto

Founder and president of Telapak