Based on the evidence, more than 97% of climate scientists are convinced that human-caused climate change is happening. In Paris in December 2015, fifty years after scientists first officially issued a warning about human-caused global warming, almost all nations on Earth agreed that the issue urgently needs to be tackled, and they pledged to do so. The fact that even countries that live by selling fossil fuels agree illustrates how strong the consensus is.
Summary of studies measuring agreement among climate scientists or climate papers on human-caused global warming. Source: Cook et al. 2016.
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 Prof. Stefan Rahmstorf |
 Prof. Edward Maibach |