You'd see more floods like you've seen in Mozambique in 2000, you'd see more droughts like you saw in Kenya in the late 1990s, there would be a serious threat to the water flow down the Nile on which 10 countries depend.

Meat is a wasteful use of water and creates a lot of greenhouse gases. It puts enormous pressure on the world's resources. A vegetarian diet is better.

To claim the World Bank is just an extension of US foreign policy is just wrong.

Science and policy-making thrive on challenge and questioning; they are vital to the health of inquiry and democracy.

Do politicians understand just how difficult it could be, just how devastating rises of 4C, 5C or 6C could be? I think, not yet

I've never really had much of a career plan, and interesting opportunities kept cropping up.

The one way of guaranteeing to fail is to assume that we will.