The Washington Polcy Center reminds us that environmentalists have a less than stellar record in the predicting the future.
Considering their record, it's actually quite reasonable to bet against them. I do happen to think we are probably in for a cooling period, because sunspot activity has lessened considerably. Despite the late change from global warming to climate change, probably so that they can blame chilly winters on human industry, the mainstream environmentalist message seems to disregard the sun almost entirely. One would think a greenhouse simply warmed according to it's own virtue.