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Fusing subnational with national climate action is central to decarbonization: the case of the United States

Environmental Studies and Forestry

Fusing subnational with national climate action is central to decarbonization: the case of the United States

N. E. Hultman, L. Clarke, et al.

Discover how local actions in the U.S. can drive significant climate change efforts! This research, conducted by an expert team including Nathan E. Hultman and Leon Clarke, reveals that existing commitments from states, cities, and businesses could reduce emissions by 25% below 2005 levels by 2030, paving the way for even greater federal initiatives in alignment with the Paris Agreement.

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Playback language: English
Abstract
Approaches that root national climate strategies in local actions will be essential for all countries as they develop new nationally determined contributions under the Paris Agreement. The potential impact of climate action from non-national actors in delivering higher global ambition is significant. Sub-national action in the United States provides a test for how such actions can accelerate emissions reductions. We aggregated U.S. state, city, and business commitments within an integrated assessment model to assess how a national climate strategy can be built upon non-state actions. We find that existing commitments alone could reduce emissions 25% below 2005 levels by 2030, and that enhancing actions by these actors could reduce emissions up to 37%. We show how these actions can provide a stepped-up basis for additional federal action to reduce emissions by 49%—consistent with 1.5 °C. Our analysis demonstrates sub-national actions can lead to substantial reductions and support increased national action.
Publisher
Nature Communications
Published On
Oct 16, 2020
Authors
Nathan E. Hultman, Leon Clarke, Carla Frisch, Kevin Kennedy, Haewon McJeon, Tom Cyrs, Pete Hansel, Paul Bodnar, Michelle Manion, Morgan R. Edwards, Ryna Cui, Christina Bowman, Jessie Lund, Michael I. Westphal, Andrew Clapper, Joel Jaeger, Arijit Sen, Jiehong Lou, Devashree Saha, Wendy Jaglom, Koben Calhoun, Kristin Igusky, James de Weese, Kareem Hammoud, J. C. Altimirano, Margaret Dennis, Chris Henderson, Gill Zwicker, John O'Neill
Tags
climate action
emissions reduction
Paris Agreement
sub-national efforts
U.S. commitments
federal action
sustainability
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