Guardian: The 2013 Intergovernmental Panel on Climate Change (IPCC) report states with 95 percent confidence that humans have caused most, and probably all of the rapid global warming over the past 60 years. Approximately 97 percent of climate experts and peer-reviewed climate science studies agree.
There are of course open questions yet to be answered by climate scientists precisely how sensitive the climate is to the increased greenhouse effect, for example. But even in a best case, low sensitivity...