[Majost]

Right, but if I remember correctly, global warming will also cause more unstable weather patterns -- and not necessarily warm ones (cf. Denver Blizzards). The warming comes from the fact that the *global average* temperature is raising. But locally- and temporally-isolated events should not be rashly blamed entirely on global warming.

I think that global warming is partially the culprit for this winter's unusual weather patterns, and maybe the trigger -- but we'll never know.