claim: That humans are causing global warming is the position of the Academies of Science from 80 countries plus many scientific organizations that study climate science.
evidence: International Council of Academies of Engineering and Technological Sciences ( CAETS ) in 2007, issued a Statement on Environment and Sustainable Growth : As reported by the Intergovernmental Panel on Climate Change ( IPCC ), most of the observed global warming since the mid-20th century is very likely due to human-produced emission of greenhouse gases and this warming will continue unabated if present anthropogenic emissions continue or, worse, expand without control.