We're either going to save the world or no one will be saved.

We may get to the point where the only way of saving the world will be for industrial civilization to collapse.

After all, sustainability means running the global environment - Earth Inc. - like a corporation: with depreciation, amortization and maintenance accounts. In other words, keeping the asset whole, rather than undermining your natural capital.

The Prime Minister of India, at a meeting that I co-chaired a few months ago, stated that any development that is not sustainable is not development.

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.

Strengthening the role the United Nations can play...will require serious examination of the need to extend into the international arena the rule of law and the principle of taxation to finance agreed actions which provide the basis for governance at the national level. But this will not come about easily. Resistance to such changes is deeply entrenched. They will come about not through the embrace of full blown world government, but as a careful and pragmatic response to compelling imperatives and the inadequacies of alternatives.

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