The Consensus Handbook

Naomi Oreskes was the first to quantify the level of expert agreement on human-caused global warming in 2004. Analyzing 928 scientific papers on global climate change, she couldn’t find a single peer-reviewed paper rejecting human caused global warming. This was the first research that put hard numbers on the overwhelming scientific consensus, and was featured prominently in Al Gore’s award-winning movie, An Inconvenient Truth.