Temperature data showing rapid warming in the past few decades, the latest data going up to 2021. According to NASA, 2016 and 2020 are tied for the warmest year since 1880, continuing a long-term trend of rising global temperatures. The eight most recent years have been the warmest. Credit: NASA’s Goddard Institute for Space Studies

he scientific consensus that climate change is happening and that it is human-caused is strong. Scientific investigation of global warming began in the 19th century, and by the early 2000s, this research began to coalesce into confidence about the reality, causes, and general range of adverse effects of global warming. This conclusion was drawn from studying air and ocean temperatures, the atmosphere’s composition, satellite records, ice cores, modeling, and more.

In 1988 the United Nations and World Meteorological Organization founded the Intergovernmental Panel on Climate Change, IPCC, to provide regular updates on the scientific evidence on global warming. In a 2013 report, the IPCC concluded that scientific evidence of warming is “unequivocal” and that […]

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