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.

Everything has to be done to build some sort of international democracy. We've seen only the tiniest beginnings of that.

Only around 2% of the earth's surface is cultivatable land.

The Sierra Club in the United States has now really come out for population control and reduction.

If the economy becomes disembodied from society it can only lead to disaster.

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.

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