Cover Recommended Reading: Climate Science Special Report Fourth National Climate Assessment (NCA4), Volume I, the first of two volumes of the Fourth National Climate Assessment, mandated by the Global Change Research Act of 1990. Key Links https://science2017.globalchange.gov https://science2017.globalchange.gov/downloads/CSSR2017_FullReport.pdf https://twitter.com/usgcrp Hashtags: #CSSR2017 #NCA4 Summary New observations and new research have increased our understanding of past, current, and future … Continue reading National Climate Assessment #nca4