My travels through physics really are the same urges that make me travel through ecology. They are not really different, except that there is an added dimension of seeing ecological destruction and seeing the very life-support system that makes us survive on this planet being destroyed. That makes me do more than just inquire; it compels me to act and to intervene.

My mother taught that if anyone needs you, you should be available to them.

If you are doing the right thing for the earth, she's giving you great company.

The primary threat to nature and people today comes from centralising and monopolising power and control. Not until diversity is made the logic of production will there be a chance for sustainability, justice and peace. Cultivating and conserving diversity is no luxury in our times: it is a survival imperative.

I do sculpting sometimes when I have the time, and the first thing I sculpted was a bust of [Albert] Einstein. It still sits on my table and still inspires me. He was a person who triggered my imagination and my ideas.

The abuse of the Earth is the ecological crisis.

Something is very, very wrong when people don’t have access to drinking water, and Coke creates its market out of that scarcity.