Ronald Bailey on what may be the most common (and politically influential) form of climate change denialism.

The California Air Resources Board issued a fanciful study finding that mandates to cut greenhouse gas emissions will cost Californians essentially nothing. This is pure California dreaming. In his stinging critique of the study, Harvard economist Stavins said that putting the world on a less carbon-intensive path will require serious policy and sacrifice. "This will not be easy, and it will not be cheap," he wrote. "Indeed it will be costly."