And what politician is going to initiate the abolition of the private car, Jack?

Pollution doesn't just mean dangerous or poisonous things. The pollution that is threatening the planet is carbon dioxide, and it is all-pervasive.

By the way, road transport of all types contributes around 16% of man-made carbon dioxide emissions. Shipping is only two percentage points behind. The generation of heat and electricity contributes 41%. Air transport, 11%. Industry and agriculture, 20%. Deforestation, about 9%. I know that's over a hundred but the categories often overlap. The generation of heat for heating buildiings, or the use of electricity for the cooling thereof, and the amelioration of bad agricultural practices would be far more fertile areas to attack. You go on about cars, but round here tractors being used as ordinary road vehicles for mile after mile are a plague. As for road transport, Dr Beeching has a lot to answer for. I'm not defending cars, by the way. I think that if you choose to buy a car that does less than sixty to the gallon you should pay a hefty annual penalty. And no-one in the US is paying anything like three dollars a gallon. And no-one dares do anything about that. And I know that US gallons are half a litre smaller than ours, but that hardly makes up for it, does it?