The combination of population growth and the growth in consumption is a danger that we are not prepared for and something we will need global co-operation on.

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.

Nevertheless, the concept of sustainable development is now known - even amongst those who haven't accepted it - and it's recognized, debated and followed by an increasing number of businesses.

I learn something from criticism because when it comes from sources you respect you always examine it and learn.

I was with Ted Turner when he came to see Kofi Annan - the Secretary-General of the UN - to announce his decision to put $1 billion to the service of UN projects and programs.

So, what we do as individuals matters. It adds up.

My belief is that the purpose of economic life is to meet the social needs of people.