Co-Founder, Extinction Rebellion

President and Chief Executive Officer, The Trust for Public Land

American Indian Studies Lecturer, California State University San Marcos

Johnstone Family Professor of Psychology, Harvard University

Marine & Aviation Program Director, International Council on Clean Transportation

Co-Founder & Executive Director, Alianza Americas

Author, The Faraway Brothers

Journalist, National Geographic

Head of Migration, Environment and Climate Change, UN Migration Agency

Co-Founder, Research Director, Council on Strategic Risks

Founder and Principal, Climate Awakening

Author, Billionaire Wilderness