How do Human Activities Contribute to Climate Change and How do They Compare with Natural Influences?
"The differences...between the present day and the start of the industrial era for solar irradiance changes and volcanoes are both very small compared to the differences...estimated to have resulted from human activities. As a result, in today’s atmosphere, the radiative forcing from human activities is much more important for current and future climate change than the estimated radiative forcing from changes in natural processes.