Christian Science Monitor: Skepticism about climate change is going mainstream, and that is worrying. One-third of Americans now say global warming doesn’t exist – triple the percentage of three years ago. This defiance of science isn’t just harmful for the environment. It’s also distracting us from growing threats to US national security. Actual – not theoretical – effects of climate change are turning the Arctic into a potential military flash point. Expected melting of summer sea ice in the Arctic …