I started out in nuclear physics. But after I became more sensitized to the environmental and health implications of the nuclear system - I was being trained to be the first women in the fast-breeder reactor in India (and was in it when it first went critical) - I didn't feel comfortable with it. So I went into theoretical physics.

I have called this phenomenon of stealing common knowledge and indigenous science "biopiracy" and "intellectual piracy." According to patent systems we shouldn't be able to patent what exists as "prior art." But the United States patent system is somewhat perverted. First of all, it does not treat the prior art of other societies as "prior art." Therefore anyone from the United States can travel to another country, find out about the use of a medicinal plant, or find a seed that farmers use, come back here, claim it as an invention or an innovation.

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.

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 role of geo-engineering should, in a world of responsibility, in a world of scientifically enlightened decision making and ecological understanding, it should be zero. There is no role for geo-engeneering. Because what is geoengineering but extending the engineering paradigm?

It's not an investment if its destroying the planet.

The problem of numbers can only be dealt with by recognizing that people have a fundamental right to economic security. If you provide them with economic and environmental security, the population will stabilize itself.