Climate change is probably the greatest long-term challenge facing the human race.

Some may belittle politics, but we know - who are engaged in it - that it is where people stand tall. And, although I know it has its many harsh contentions, it is still the arena that sets the heart beating a little faster. And if it is, on occasions, the place of low skulduggery, it is more often the place for the pursuit of noble causes.

I think what happened with 9/11 is that people sort of felt that it came from nowhere. Whereas I think now we understand the roots are very deep. I say it's like revolutionary Communism, something that is going to have to be knocked out over a very long period of time. This strain of extremism continues to be very strong, whether it's in Afghanistan, or Somalia or Yemen, or any of these places.

Education, education, education

There are literally thousands of sites. As I was told in Iraq, information is coming in the entire time, but it is only now that the Iraq survey group has been put together that a dedicated team of people, which includes former UN inspectors, scientists and experts, will be able to go in and do the job properly.

It's not a burning ambition for me to make sure that David Beckham earns less money.

I have long believed this interdependence defines the new world we live in.