evidence: In strong, confident tones, the IPCC's document says "it is unequivocal that human influence has warmed the atmosphere, oceans and land". [...] The authors say that since 1970, global surface temperatures have risen faster than in any other 50-year period over the past 2,000 years. [...] Global surface temperature was 1.09C higher in the decade between 2011-2020 than between 1850-1900.