I was recently looking at what they can actually do to reduce consumption of petrol. It would be quite possible to build automobiles out of carbon fibre that would be just as strong, weigh 10 times less and consume 10 times less petrol.

If we wait for the U.S. to do something, we will be waiting for a very long time. It's Europe, it's Australia, it's the other developed and middle developing countries that have got to do the job.

As the rich consume more and more, they are clearly not going to want to downgrade their own status.

It seems to be the thing now that young people are getting back into politics.

The question is not only what is grown but what it's used for. There's not going to be a mass transformation of dietary habits in rich countries-on the contrary, the first thing people do when they become more prosperous is to buy more meat.

The World Development Movement, to take just one example, is doing good work. Some political parties are, too.

The World Bank is now the biggest culprit in the debt crisis.