You need to be careful not to over-reach and also assess the capacity you have to work with.

If we can come up with innovations and train young people to take on new jobs, and if we can switch to clean energy, I think we have the capacity to build this world not dependent on fossil-fuel. I think it will happen, and it won't destroy economy.

You are never too young to lead and you should never doubt your capacity to triumph where others have not.

Sadly, a prize for peace is a rarity in this world. Most nations have monuments or memorials to war, bronze salutations to heroic battles, archways of triumph. But peace has no parade, no pantheon of victory.

In fact UN is more of a galaxy of organisations and agencies than one machine.

Our biggest challenge in this new century is to take an idea that seems abstract - sustainable development - and turn it into a reality for all the world's people

It is not in the United Nations that the Millennium Development Goals will be achieved. They have to be achieved in each of its Member States, by the joint efforts of their governments and people.