Join online today and as a special thank you, we'll send you a free rucksack as well as a one-year subscription to Sierra magazine and the City Sierran.For several years climate scientists have said that global warning will be accompanied by more extreme weather events, but that you can’t link specific events to global warming. A year ago, Bill McKibbon did just that in a Washington Post Op-Ed piece. Now, more and more Americans seem to be doing the same thing.
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