Weird Weather and Climate Change

This year — and the past decade — have seen an increase in human catastrophes caused by unusually "extreme weather" of different kinds. Arizona's wildfires are the result of a drought, while late snow in the western mountains has led to predictions of massive flooding. This is the kind of thing climate-change scientists have predicted, but public skepticism that it's caused by human activity is on the increase and efforts in Washington to take any action are on the decline. We look at the science and the politics.