If I can bicycle, I bicycle.
It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.
We are a plague on the Earth.
There is no question that climate change is happening; the only arguable point is what part humans are playing in it.
I'm against this huge globalisation on the basis of economic advantage.
If I can make programmes when I'm 95, that would be fine. But I would think I'll have had enough by then.
It's a moral question about whether we have the right to exterminate species.
In the old days... it was a basic, cardinal fact that producers didn't have opinions. When I was producing natural history programmes, I didn't use them as vehicles for my own opinion. They were factual programmes.
I don't like rats, but there's not much else I don't like. The problem with rats is they have no fear of human beings, they're loaded with foul diseases, they would run the place given half the chance, and I've had them leap out of a lavatory while I've been sitting on it.
The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?
London has fine museums, the British Library is one of the greatest library institutions in the world... It's got everything you want, really.
We keep putting on programmes about famine in Ethiopia; that's what's happening. Too many people there. They can't support themselves - and it's not an inhuman thing to say. It's the case. Until humanity manages to sort itself out and get a coordinated view about the planet it's going to get worse and worse.
It's coming home to roost over the next 50 years or so. It's not just climate change; it's sheer space, places to grow food for this enormous horde. Either we limit our population growth or the natural world will do it for us, and the natural world is doing it for us right now.
An understanding of the natural world and what's in it is a source of not only a great curiosity but great fulfillment.
Crying wolf is a real danger.
Everyone likes birds. What wild creature is more accessible to our eyes and ears, as close to us and everyone in the world, as universal as a bird?
There are some four million different kinds of animals and plants in the world. Four million different solutions to the problems of staying alive.
What I am interested in with birds, just as I am with spiders or monkeys, is what they do and why they do it.
Birds are the most popular group in the animal kingdom. We feed them and tame them and think we know them. And yet they inhabit a world which is really rather mysterious.
I can mention many moments that were unforgettable and revelatory. But the most single revelatory three minutes was the first time I put on scuba gear and dived on a coral reef. It's just the unbelievable fact that you can move in three dimensions.