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- Fourth National Climate Assessment https://nca2018.globalchange.gov/downloads/ 5 comments science
- Fourth National Climate Assessment Volume II: Impacts, Risks, and Adaptation in the United States https://nca2018.globalchange.gov 4 comments politics
- Fourth National Climate Assessment: "Global annually averaged surface air temperature has increased by about 1.8°F (1.0°C) over the last 115 years (1901–2016)." https://science2017.globalchange.gov/ 9 comments science