I think it's important that people think about what they are doing and that includes what they are eating. I am 61 now and attitudes towards drinking and driving have changed radically since I was a student. People change their notion of what is responsible. They will increasingly ask about the carbon content of their food.

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

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

This [climate change] is potentially so dangerous that we have to act strongly. Do we want to play Russian roulette with two bullets or one?

Unfortunately, the current pace of progress is not nearly rapid enough, with many rich industrialised countries being slow to make the transition to cleaner and more efficient forms of economic growth.

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

Adaptation is the only means to reduce the now-unavoidable costs of climate change over the next few decades