I'm not over-fond of animals. I am merely astounded by them.

The future of life on earth depends on our ability to take action. Many individuals are doing what they can, but real success can only come if there's a change in our societies and our economics and in our politics. I've been lucky in my lifetime to see some of the greatest spectacles that the natural world has to offer. Surely we have a responsibility to leave for future generations a planet that is healthy, inhabitable by all species

The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?

The process of making natural history films is to try to prevent the animal knowing you are there, so you get glimpses of a non-human world, and that is a transporting thing.

Very few species have survived unchanged. There's one called lingula, which is a little shellfish, a little brachiopod about the size of my fingernail, that has survived for 500 million years, but it's survived by being unobtrusive and doing nothing, and you can't accuse human beings of that.

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

There is no question that climate change is happening; the only arguable point is what part humans are playing in it.