Hill: A new federal study stopped short of directly linking extreme weather last year to climate change, but said that it made certain weather events much more likely. In North America, that included extreme wildfires in California, tropical cyclones in Hawaii and mild winter in the Midwest, according to the National Oceanic and Atmospheric Administration (NOAA). Other weather events, like Californias drought, extreme cold in the eastern United States and the heavy winter storm season of 2013-2104 were...