The environmental movement can only survive if it becomes a justice movement. As a pure environmental movement, it will either die, or it will survive as a corporate 'greenwash'. Anyone who's a sincere environmentalist can't stand that role.

The system of technological production that we have today has been justified in terms of creating more goods to feed more people and to meet more needs. But it actually destroys more of the resources that we need in order to meet those multiple needs. If we shift to an ecological perception, a diversity perception, we realize that some of the instruments of which we are very proud are actually extremely primitive for dealing with nature. To me that is the great lesson of ecological awareness at the turn of the millennium.

I do not allow myself to be overcome by hopelessness, no matter how tough the situation. I believe that if you just do your little bit without thinking of the bigness of what you stand against, if you turn to the enlargement of your own capacities, just that itself creates new potential.

Unless the poor of the world agitate for themselves to be heard, there will be no changes in their circumstances.

We must occupy the food system to create food democracy.

I didn't leave physics because of boredom. I left it because other issues compelled me in a bigger way. And I always say to myself, "When I'm 60, I'd like to go back to what I interrupted."

We share this planet, our home, with millions of species. Justice and sustainability both demand that we do not use more resources than we need.