Either we reduce the world's population voluntarily or nature will do this for us, but brutally

I am President of the UN created University for Peace, which has a strong commitment to the relationship between peace, security and the environment. I meet with young people around the world and I always come away enthused and encouraged.

I am a socialist in ideology, a capitalist in methodology.

Anyone who is seriously interested in me would usually do a little more homework and realise that the extreme criticisms are almost exclusively ideologically based.

One of the things that Ive always thought I would like to do is to develop an environmental index. Then people can measure their own environmental performance on an index as they do in other ways.

I've got used to criticisms and, naturally, I try to make sure I don't listen to the more extreme ones because most of the people who have taken their rightwing extremist view of my life are people that I've never met.

The real goal of the Earth Charter is that it will in fact become like the Ten Commandments.