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.

In securing the future of the planet, we secure happiness for ourselves. One of the aims of the Greens is to turn around the tide of pessimism amongst the young people of the world.

Whereas our common past, out of Africa, saw a global diaspora of humankind, our common future depends on a global coming together and consensus, resulting in a more equitable distribution of the Earth's largesse. When Africa, which gave us the wealth of life, has that debt returned, the world will have come of age.

I didn't want to be a shock absorber; I wanted to deliver the shock.

Every time I get a bit worried about having made some second rate choices in life I go back and read about the Suffragettes or William Wilberforce, people who were "wrong" in their own time and think, ah well.

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

Renewable energy is proven technology, the price is dropping, the rest of the world is going that way, that's where our investment should be going as well.