If you haven’t read it already, treat yourself to a radically reasonable op-ed by Prof. Richard Lindzen of MIT on why global warming is the last thing that you should be scared of this Halloween season:
Yes, there does appear to be warming, but the amount is hardly certain or indisputable. And the amount found does not appear that alarming.
The alarm, I would suppose, comes from the notoriously inadequate climate models.
As the primary “consensus” document, the Scientific Assessment of the UN’s Intergovernmental Panel on Climate Change notes, modellers at the United Kingdom’s Hadley Centre had to cancel two-thirds of the model warming in order to simulate the observed warming.
So the warming alarm is based on models that overestimate the observed warming by a factor of three or more, and have to cancel most of the warming in order to match observations.
You will, of course, want to read the whole thing here.