The economic uses of Al Gore

These episodes from a decade ago testified to one important thing: Even climate activists recognized a need for evidence from the real world. The endless invocation of computer models wasn’t cutting it. Yet today the same circles are more dependent than ever on predictions made by models, whose forecasts lie far enough in the future that those who rely on them to make policy prescriptions are in no danger of being held accountable for their reliability.

For a while the media could patch over the scientific shortfall by reporting evidence of warming as if it were evidence of what causes warming. Inconveniently, however, just as temperature-measuring has become more standardized and disciplined and less reliant on flaky records from the past (massaged to the Nth degree), the warming trend seems to have faded from the recent record.

We could go on. But from our first column on this subject, we have been convinced that the scientific questions are interesting and irrelevant, since it was never in the cards that Western societies (or Brazil or India or China) would sacrifice economic growth for the uncertain benefits of fighting climate change. Unable to do anything meaningful about climate change, policy would therefore default to satisfying the demand of organized interests for climate pork.