First, climate change is the greatest long-term threat faced by humanity. It could cause more human and financial suffering than the two world wars and the great depression put together. All countries will be affected, but the poorest countries will be hit hardest. Secondly, the costs of inaction far outweigh the costs of action.

The science is getting worse faster than the politics is getting better.

You know, you only get to live life once, so there are two things that that yields. One is that there's no point in crying over spilt milk, but secondly you hate wasting time, energy, and whatever talent you've got...

I mean, Britain is a country of successful Muslim businesspeople, teachers and educators, journalists. So, we have to say very strongly that the two million plus Muslims in Britain, the vast bulk of them make a huge contribution to our society, and they actually make it the vibrant society it is.

Essentially, by 2050 we need all activities outside agriculture to be near zero carbon emitting if we are to stop carbon dioxide levels in the atmosphere growing

I abhor anything that constitutes torture. Water-boarding, its perfectly clear to me it is torture. I never supported extraordinary rendition to torture, always said that Guantanamo should be closed. There is no clash of ideals and pragmatism there.

The clearest evidence that we are living beyond environmental means is the threat of dangerous climate change. The scale of this threat, to human life and to the natural resources and assets on which it depends, for everything from oxygen and clean water to healthy soils and flood defence, means that this simply must be our top priority