Climate Change Science

Climate Change Impacts and Risk Analysis (CIRA)

The Climate Change Impacts and Risk Analysis (CIRA) project quantifies the physical effects and economic damages under multiple climate change scenarios. The goal of this work is to estimate to what degree climate change impacts and damages to multiple U.S. sectors (e.g., human health, infrastructure, and water resources) may be avoided or reduced in a future under different levels of future global emissions. CIRA advances the estimation of climate change damages by bridging the gap between climate modeling and economic effects, presenting both physical and monetized damages.

The peer-reviewed CIRA reports and analyses demonstrate that global action on climate change will significantly benefit Americans by saving lives and avoiding costly damages across the U.S. economy. 

Climate Change in the United States: Benefits of Global Action

The 2015 EPA report estimates the physical and monetary benefits to the U.S. of reducing global greenhouse gas emissions in six broad sectors: health, infrastructure, electricity, water resources, agriculture and forestry, and ecosystems.

Avoiding and Reducing Long-term Risks of Climate Change: A Technical Report for the Fourth National Climate Assessment

This forthcoming Technical Report, currently in peer review,  summarizes and communicates the results of the second phase of modeling under the CIRA project, and is intended to inform the fourth National Climate Assessment (NCA4) of the U.S. Global Change Research Program (USGCRP).

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