Remember the global cooling scare in the mid 70's?
Just think how bad off we'd be if we reacted to those scientists warnings and had spent $Trillions over the last 30 years trying to warm the planet.
I still am waiting for the environmentalists to use the same computer models to "predict" the past. We know a lot more about the past and it would give us great insight into how accurate their predictions for the future are.
Back in the 70s, the envirokooks here in Arizona said that "global cooling" was happening because the Saquaro cactii were moving further south towards Phoenix. Now that we have settled on "global warning," I haven't seen any indications that they have started moving north. They are still in the same place I've known them to be for the past 50 years. Go figure.