I had drawings that were the first time that mathematics was put into visual form.

Public art existed all along, but ecological art just naturally grew out of my thinking and writings in that area for years. I didn't get involved in it; I started what then became a movement.

Words are changing. I find that old expressions are outdated, so when I write something, I try to find a new expression that hasn't been born yet. It's difficult.

I always was alone. And I'm alone today. It's fine. I have lots of friends, but not in terms of working together.

I study what I work with. I studied all these different fields of science that I needed for my work. I studied how to mine a landfill and what to plant in it. It's fascinating because you learn a new field each time.

My work is about helping humanity.

People have too many problems during the day; they don't want to think.