Guardian: This summer has been one of weather-related extremes in Russia, Pakistan, China, Europe, the Arctic – you name it. But does this have anything to do with global warming, and are human emissions to blame? While it cannot be scientifically proven (or disproven, for that matter) that global warming caused any particular extreme event, we can say that global warming very likely makes many kinds of extreme weather both more frequent and more severe. For weeks, central Russia has …