I think the journey for a politician goes from wanting to please all the people all the time, to a political leader that realises in the end his responsibility is to decide. And when he decides, he divides.

However much I dislike the idea of abortion, you should not criminalize a woman who, in very difficult circumstances, makes that choice.

We need to develop the new green industrial revolution that develops the new technologies that can confront and overcome the challenge of climate change; and that above all can show us not that we can avoid changing our behaviour but we can change it in a way that is environmentally sustainable.

I mean, you can agree or disagree with Iraq or Afghanistan, but by the way, now the great campaigning cause out there is the absence of intervention in Syria. And then in Libya, it's partial intervention. And that doesn't really explain why some countries that have literally nothing to do with the interventions in the Middle East end up getting targeted.

People always think American politics is very different, but usually it is a predictor of what happens in the politics elsewhere.

There is good evidence that last year's European heat wave was influenced by global warming. It resulted in 26,000 premature deaths and cost $13.5bn.

The world is a better place with Saddam in prison not in power.