Further support comes from the UK for the theory that the point of global warming hysterics is to raise taxes, not help the environment. Even if you buy into the AGW hypothesis. Robert Winnett of the UK Telegraph reports: 

The "green levy" on motorists announced in Alistair Darling's first Budget will double car tax revenue to £4 billion [$8 billion] but reduce vehicle emissions by less than one per cent, Treasury figures have showed.

This will result in the owners of family cars, estates [station wagons] and people carriers paying hundreds of pounds a year more to use the roads. [....]

Justine Greening, a shadow Treasury minister who obtained the figures, said last night: "This is a massive tax hike which will have virtually no impact on the environment.

"Despite their claims, the Government don't expect this move to change behaviour at all - it is just another eco-stealth tax of the worst kind."

Some of the biggest tax increases are planned for drivers of mid-range family cars, including some models of the Ford Focus, the Renault Espace and even Nissan Micras.

However, the tax rises for Porsches and Rolls-Royces will be less....