John Hall

Associate Vice President and Texas State Director for Clean Energy, Environmental Defense Fund

Aaron Naparstek

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

Sheila Sri Prakash

Architect, Urban Designer & Sustainability Expert

Emily Parsons-Lord

Cross-Disciplinary Artist

Donna Haraway

Distinguished Professor Emerita in the History of Consciousness Department and Feminist Studies Department at the University of California, Santa Cruz

Sheila Watt-Cloutier

Environmental, Cultural & Human Rights Advocate, Former Canadian President of the Inuit Circumpolar Council

Jennifer Ackerman

Award-Winning Author & Writer

Timothy Beatley

Professor of Sustainable Communities at the University of Virginia & Author

Shelley Poticha

Chief Climate Strategist for the Natural Resource Defense Council

Dr. Sylvia Hood Washington

Chief Environmental Research Scientist at Environmental Health Research Associates, LLC.

Andrew Steer

President & CEO of the Bezos Earth Fund; Former President & CEO of the World Resources Institute

Explore 2023: Andrew Steer, CEO of Bezos Earth Fund

Valerie Karplus

MIT Sloan Professor, Environmental Management Researcher

Jen Rustemeyer

Producer and Filmmaker

Achim Steiner

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

Davida Herzl

Co-Founder & CEO, Aclima

Collision Keynote: Davida Herzl

Nina Fedoroff

Molecular Biologist; Biotechnology Expert & Professor of Biology at Penn State

Kartik Chandran

Environmental Engineer & Professor at Columbia University

Andrew Hoffman

Holcim (US) Professor of Sustainable Enterprise at the University of Michigan

David Festa

Vice President, Ecosystems, Environmental Defense Fund (Festival Underwriter)

Laurel Firestone

Co-Executive Director & Attorney at Law at Community Water Center

Nick Wobbrock

Co-Founder of Blue Forest Conservation

Michael Shellenberger

Founder & President of Environmental Progress; Expert on Energy, Climate, Security, Human Development and Politics

Jeff Orlowski-Yang

Award-winning Filmmaker, Photographer, Entrepreneur & Climate Change Activist

Ric O'Barry

Wildlife Activist, Author & Founder of the Dolphin Project; Star of the Academy Award-Winning Documentary "The Cove"

Pete McBride

Photographer; Filmmaker

Tzeporah Berman

International Program Director of Stand.earth, Chair at Fossil Fuel Non-Proliferation Treaty & Author of "This Crazy Time: Living Our Environmental Challenge"

Quitting Fossil Fuels with Tzeporah Berman - YouTube

Calum Worthy

Canadian Actor & Environmental Activist

Bindi Irwin

Wildlife Conservationist & Daughter of Steve Irwin; Season 21 Contestant on "Dancing With the Stars"

Matthew Kahn

Professor of Economics, UCLA Institute of the Environment

Paul Bunje

Senior Director, Oceans XPRIZE