All we can hope for is that the thing is going to slowly and imperceptibly shift. All I can say is that 50 years ago there were no such thing as environmental policies.

I had a huge advantage when I started 50 years ago - my job was secure. I didn't have to promote myself. These days there's far more pressure to make a mark, so the temptation is to make adventure television or personality shows. I hope the more didactic approach won't be lost.

The climate, the economic situation, rising birth rates none of these things give me a lot of hope or reason to be optimistic.

I often get letters, quite frequently, from people who say how they like the programmes a lot, but I never give credit to the almighty power that created nature.

Nature isn't positive in that way. It doesn't aim itself at you. It's not being unkind to you.

Many individuals are doing what they can. But real success can only come if there is a change in our societies and in our economics and in our politics.

I'm not in politics.

Nature isn't positive in that way. It doesn't aim itself at you. It's not being unkind to you.

I often get letters, quite frequently, from people who say how they like the programmes a lot, but I never give credit to the almighty power that created nature.

The whole of science, and one is tempted to think the whole of the life of any thinking man, is trying to come to terms with the relationship between yourself and the natural world. Why are you here, and how do you fit in, and what's it all about.