The international climate reports (IPCC) are the result of a lot of scientific work followed by heavy politicking. When early reports from the scientists were

The international climate reports (IPCC) are the result of a lot of scientific work followed by heavy politicking. When early reports from the scientists were alarming, the reports were watered down instead of stating the 50% case. Some of the politics came from the committee being afraid of overstating things, but perhaps a larger amount came from the US contingent basically saying they wouldn't endorse the report unless it got watered down. What is why, as time went on, more data was collected, and the science got more confident, the results get revised upwards. The first google hit after searching on "IPCC political pressure" https://www.theguardian.com/environment/earth-insight/2014/may/15/ipcc-un-climate-reports-diluted-protect-fossil-fuel-interests https://www.theguardian.com/environment/earth-insight/2014/m... Though that report is from 2014, it has been going for 20 years.