Straight: The Intergovernmental Panel on Climate Change just released the first of four chapters of its Fifth Assessment Report. It shows scientists are more certain now than in 2007 when the Fourth Assessment was released that humans are largely responsible for global warming--mainly by burning fossil fuels and cutting down forests--and that its getting worse and poses a serious threat to humanity. It contains hints of optimism, though, and shows addressing the problem creates opportunities.
The IPCC...