claim: The IPCC ( 2013 ), USGCRP ( 2017 ), and USGCRP ( 2018 ) indicate that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-twentieth century.
evidence: These, together with other anthropogenic drivers, are extremely likely ( where that means more than 95% probability ) to have been the dominant cause of the observed global warming since the mid-20th century.