There's a presumption that somehow you calculate beforehand whether something is going to be good politically or not. I simply don't.

We people of the Earth exist because our potential was there in the Big Bang, 13.7 billion years ago, as the universe exploded into being.

So far as we know, Earth is the only planet which supports life, and it is the only planet on which we can survive. Our bodies and our minds are fashioned by it. Our hearts resonate with it. There will be little joy for the human spirit if we destroy the natural fabric of Earth with nothing left to do but go shopping. When we imagine the world a century from now, when we look our great grandchildren in the eye and see them smiling back at us because they know we cared for them, we smile too!

Exxon, Coca-Cola, BHP Billiton and News Corporation have much more say in organising the global agenda than the planet's 5 billion mature-age voters without a ballot box.

The future will either be green or not at all.

I think I could have been quite difficult to fathom as a youngster, this kid who didn't talk about himself very much.

I will be Green until the day I die, if not for a long time after.