As the snow began to fall earlier this week in the lead up to the season's first major blizzard, New York Governor Andrew Cuomo told reporters that the Northeast was witnessing "a pattern of extreme weather that we've never seen before." Climate change, Cuomo argues, is fueling bigger, badder weather events like this one—and like Hurricane Sandy. While the science that links specific snowstorms to global warming is profoundly difficult to calculate, the Intergovernmental Panel on Climate Change says it's "very likely"—defined as greater than 90 percent probability—that "extreme precipitation events will become more intense and frequent" in North America as the world warms.