Have to pat on my back on my ability of eyeballing

http://en.wikipedia.org/wiki/List_of_scientists_opposing_the_mainstream_scientific_assessment_of_global_warming#mediaviewer/File:Climate_science_opinion2.png

Those who think global warming is caused by human: total 718
Those who think global warming is not caused by human: total 29

718 / (718 + 29) = 96.1%