The moves now being made by the world's political establishment to lock us into December's Copenhagen treaty to halt global warming are as alarming as anything that has happened in our lifetimes. Last week in Italy, the various branches of our emerging world government, G8 and G20, agreed in principle that the world must by 2050 cut its CO2 emissions in half. Britain and the US are already committed to cutting their use of fossil fuels by more than 80 per cent. Short of an unimaginable technological revolution, this could only be achieved by closing down virtually all our economic activity: no electricity, no transport, no industry. All this is being egged on by a gigantic publicity machine, by the UN, by serried ranks of government-funded scientists, by cheerleaders such as Al Gore, last week comparing the fight against global warming to that against Hitler's Nazis, and by politicians who have no idea what they are setting in train.