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

We can now manipulate images to such an extrodinary extent that there's no lie you cannot tell.

You've got to be fairly solemn [about the environment]. I mean the mere notion that there are three times as many people on Earth as there were when I started making television. How can the Earth accommodate them? When people, including politicians, set their faces against looking at the consequences-it's just unbelievable that anyone could ignore it.

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.

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

‎Using his burgeoning intelligence, this most successful of all mammals has exploited the environment to produce food for an ever increasing population. Instead of controlling the environment for the benefit of the population, perhaps it's time we controlled the population to allow the survival of the environment.

The reverse side of the coin in having this extraordinary ability to go anywhere, is that no one anywhere is remote any more.