When the Climate Change Bill passed through parliament last year, I read the cost benefit assessment ministers are obliged to produce for any bill. Amazingly, it put the potential costs (of reducing carbon emissions by 60%) at £205 billion ($331 billion)—yet the maximum benefits (of reduced climate change damage) were estimated at only £110 billion. This is the first time any government had asked parliament to support a bill that its own figures say will do more harm than good. Yet just five of us voted against it. At least I had the satisfaction of pointing out that while the House was voting for a bill based on the assumption the world is getting warmer, it was snowing in London in October for the first time in 74 years. I was told, "extreme cold is a symptom of man made global warming."

Peter Lilley, 'Global Warming as Groupthink' WSJ