The IPCC’s assessment on climate change warns us of the environmental risk if we don’t take dramatic action. We explore the report, the state of scientific research on climate change, and the need for political action. What actions do we need to take to mitigate and adapt to climate change?

* Jennifer Allan is Lecturer in International Relations in the School of Law and Politics at Cardiff University. She is the author of The new climate activism: NGO authority and participation in global climate governance and A net-zero emissions economic recovery from COVID-19.

* Gabriel Vicchi is Professor in the Department of Geosciences and High Meadows Environmental Institute and Director of the High Meadows Environmental Institute (HMEI) at Princeton University. He is also Deputy Director of the Cooperative Institute for Modeling the Earth System (CIMES). He is the author of Causes of large projected increases in hurricane precipitation rates with global warming, Increased frequency of extreme La Niña events under greenhouse warming and Weakening of the North American monsoon with global warming.

* Stephen R. Palumbi is Jane and Marshall Steel Jr. Professor in Marine Sciences at Stanford University and the Harold A. Miller Director of the Hopkins Marine Station. He is the co-author of Using naturally occurring climate resilient corals to construct bleaching-resistant nurseries, Ocean acidification causes variable trait shifts in a coral species, and Impacts of biodiversity loss on ocean ecosystem services.

* Pamels Chasek is Professor and Chair of the Political Science Department at Manhattan College. She is the author of Global Environmental Politics and co-editor of The Roads from Rio: Lessons Learned from Twenty Years of Multilateral Environmental Negotiations.

This program is produced by Ankine Aghassian, Doug Becker, Melissa Chiprin and Sudd Dongre.