Santa Rosa Press Democrat: When Hurricane Katrina hit the Gulf Coast, many of us asked if it was caused by global warming. Now Sandy has hit, causing incredible death and destruction in the Northeast. We again ask if the storm was caused by climate change. We don’t know for sure what role climate change played in Sandy, but we do know that the coastal ocean water is 9 degrees warmer than average for this time of year and that warmer water tends to make hurricanes more powerful. We also know that the water level is a foot…

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