Whoops! That should have been at saggs! Sorry!!
CAP, yes it is powered by the sun. But that isn't the only factor. The tilt, the rotation, the distance, all play into it. The moon also affects how warm we get (holds tilt in place).
One last thing, somebody said that the number of people on AGW those scientists represented, please show me the raw data (note the irony).
-Penguin