[W]hen we look at the graphs of rising ocean temperatures, rising carbon dioxide in the atmosphere and so on, we know that they are climbing far more steeply than can be accounted for by the natural oscillation of the weather ... What people (must) do is to change their behavior and their attitudes ... If we do care about our grandchildren then we have to do something, and we have to demand that our governments do something.

It never really occurred to me to believe in God.

You'll discover in countries where women have control over their own bodies, where they have education, where they have birth control, where they have facilities and where they are literate, when those things happen, the birth rate falls.

Nothing in the natural world makes sense - except when seen in the light of evolution

People are not going to care about animal conservation unless they think that animals are worthwhile.

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

I'm not an animal lover if that means you think things are nice if you can pat them, but I am intoxicated by animals.