After reading several papers and seeing gore's movie on GW I'm still searching for solid scientific causal evidence (versus correlations or circumstancial) that anthropogenic greenhouse gases are the cause of global warming in the post-industrial age. I accept we are in a warm epoch, atmospheric CO2 is higher than average, humans have made CO2 levels higher, and natural CO2 levels correlate historically with temperatures. This may be enough for some, but it still does not prove human causality. I'm not rejecting the thesis of human causality for global warming, just would like to read a scientific argument that doesn't rely on correlation, circumstances, or simulations. Is that's all there is?