If you decide to run for the leadership, you have to go through it with the people you love. But you also have to protect them and I am determined to protect my mum.

The problems that the world faces - from nuclear proliferation to climate change - can't be tackled by the West alone. They need a coalition of not just West and East, but they need a coalition of Christian and Jew and Muslim.

Consuming three planets' worth of resources when in fact we have one is the environmental equivalent of childhood obesity - eating until you make yourself sick.

Economic dynamism can be combined with environmental and social responsibility. High financial returns can go hand in hand with respect for human rights, and the preservation of the planet's natural resources

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.

Turning every business into an environmental industry will involve applying new principles...first, we need to make more with less...second, we need to design out waste...third, we must begin to decarbonise our energy supply

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