I don't think we are going to become extinct. We're very clever and extremely resourceful - and we will find ways of preserving ourselves, of that I'm sure. But whether our lives will be as rich as they are now is another question.

It is that range of biodiversity that we must care for - the whole thing - rather than just one or two stars.

I have no doubt that the fundamental problem the planet faces is the enormous increase in the human population

You know, it is a terrible thing to appear on television, because people think that you actually know what you're talking about.

I'm no longer sceptical. I no longer have any doubt at all. I think climate change is the major challenge facing the world.

If we were all to reduce our demands for energy, it would make an enormous amount of difference.

To suggest that God specifically created a worm to torture small African children is blasphemy as far as I can see. The Archbishop of Canterbury doesn't believe that.