Bhawks is correct, in theory. A warming earth will cause warm freshwater to dilute salinity in the north Atlantic resulting in disrupting the North Atlanic Current. This loop pulls warm water north diffusing powerfull hurricanes as they move north. This will cause cooling, a new Ice Age. THEN we need to worry about glaciers. I plan to be dead by then. Even so, it is the ultimate arrogance to assume we can alter God's plan.