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

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

Occupy World Street is a masterpiece which deserves to get wide circulation and commitment by world leaders.

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.

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.

Nothing less than the fate of the planet is at stake... No place on the planet can remain an island of affluence in a sea of misery.

A citizen of an advanced industrialized nation consumes in six months the energy and raw materials that have to last the citizen of a developing country his entire lifetime.