Fourth National Climate Assessment
Impacts, Risks, and Adaptation in the United States
These Summary Findings represent a high-level synthesis of the material in the underlying report. The findings consolidate Key Messages and supporting evidence from 16 national-level topic chapters, 10 regional chapters, and 2 chapters that focus on societal response strategies (mitigation and adaptation). Unless otherwise noted, qualitative statements regarding future conditions in these Summary Findings are broadly applicable across the range of different levels of future climate change and associated impacts considered in this report.
A new US government report delivers a grim forecast about climate change
Fourth National Climate Assessment Report
NCA4: Fourth National Climate Assessment Summary Findings
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