It's a moral question about whether we have the right to exterminate species.

If we were all to reduce our demands for energy, it would make an enormous amount of difference.

The World is full of wonders, but they become more Wonderful, not less Wonderful when Science looks at them.

I don't think whole populations are villainous, but Americans are just extraordinarily unaware of all kinds of things. If you live in the middle of that vast continent, with apparently everything your heart could wish for just because you were born there, then why worry? [...] If people lose knowledge, sympathy and understanding of the natural world, they're going to mistreat it and will not ask their politicians to care for it.

What humans do over the next 50 years will determine the fate of all life on the planet.

I'm swanning round the world looking at the most fabulously interesting things. Such good fortune.

No one will protect what they don't care about, and no one will care about what they have never experienced.