One must also acknowledge that there are moments in an organisation's development when fresh blood and new vision are required, which may imply that an outsider may be better suited to the leadership role.

I think the world has moved on.

Young people - with their dynamism, their energy and their inherent understanding of our interconnected world - have much to teach us. Increased educational attainment, advances in technology and the spread of information have made this generation the best educated, most connected and most informed in history

Sometimes I walk into a situation and I know somebody is going to provoke me - not maybe, I know he will provoke me - I know he will provoke me! And there are times when I simply refuse to be provoked. And the other times you have to use that superior knowledge to carry on at work without distraction, and don't allow yourself to be distracted. I laugh a lot inside and outside, and at myself sometimes.

Some have suggested that ideally there must be some international body that would treat areas like the Arctic as a global commerce, a bit like the way we treat the sea. It doesn't belong to any particular country, but to all of us, but I'm not sure some of the powerful are ready for that sort of solution.

Let us be good stewards of the Earth we inherited. All of us have to share the Earth's fragile ecosystems and precious resources, and each of us has a role to play in preserving them. If we are to go on living together on this earth, we must all be responsible for it.

We knew the Syrian situation was complex and there were lots of divisions, particularly on the side of the opposition... This is a tough job... It can perhaps be done if you stand united and work with me in putting sustained pressure on the protagonists or the parties to come together and seek a political settlement.