Director of the School of Public Policy and Global Affairs, University of British Columbia; Former Chair, Nuclear Regulatory Commission

TEPCO Professor of Nuclear Science and Engineering, MIT

Senior Research Scholar and the Senior Director of Research at the Center on Global Energy Policy, Columbia University

Writer, historian, and activist

Director, Kennisland, Former Deputy Mayor, Amsterdam

Journalist and author of Austerity Ecology & The Collapse-Porn Addicts

Climate and social justice activist

Climate Fiction Creative Manager, Grist

Green Stories Project; Professor of Sustainable Business at the University of Southampton; author, "Habitat Man"

author, "The Water Knife"

CEO, Hight Logistics

Senior Vice President, California Trucking Association

Executive Director, North American Council for Freight Efficiency

Heavy-Duty Vehicles Program Director at the International Council on Clean Transportation

IPCC Climate Scientist, author, Humanity’s Moment: A Climate Scientist’s Case for Hope

Author, The Quickening: Creation and Community at the Ends of the Earth

Journalist, Author of “Paved Paradise, How Parking Explains the World”

Mayor of Cleveland; Chair, Climate Mayors

Former Mayor of Toronto

Strategy Consultant, Future Matters; former youth climate activist