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

Well, I'm having a good time. Which makes me feel guilty too. How very English.

If I can make programmes when I'm 95, that would be fine. But I would think I'll have had enough by then.

What I am interested in with birds, just as I am with spiders or monkeys, is what they do and why they do it.

There's a small worm called Loa Loa Filariasis. This parasite can survive in one environment exclusively- namely, underneath the skin and inside the eyes of human beings. Children and the elderly in tropical regions (usually the poorest) are the most widely affected. A painful, slow death is virtually certain. The worm can actually live in the host for 17 years before the host finally dies.

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

The climate suits me, and London has the greatest serious music that you can hear any day of the week in the world - you think it's going to be Vienna or Paris or somewhere, but if you go to Vienna or Paris and say, 'Let's hear some good music', there isn't any.