Climate change hardly visible in North America

http://www.vancouversun.com/mobile/iphone/story.html?id=4736609

Scientists from Stanford and Columbia Universities said Canadian and U.S. temperatures since 1980 have changed, but are still within the range of "natural variability" in weather. So in North America, the effects of climate change are practically invisible. A notable exception to the (world's) warming pattern is the United States," they write in a study published Friday.