We are, above all else, biological beings, with an absolute need for clean air from the moment of birth to the last death rattle. We are about 60 per cent water by weight, so we need clean water to be healthy. We eat plants and animals for our nourishment, so whatever they're exposed to ends up in our bodies. We need clean soil to give us clean food. These are basic, biological facts and should be the prism through which any decision is made at individual, corporate or government levels. Protection of air, water, soil and the web of life should be the highest social, political and economic priority.