The environmental crisis is a global problem, and only global action will resolve it.

Earth Day 1970 was irrefutable evidence that the American people understood the environmental threat and wanted action to resolve it.

Environmental pollution is an incurable disease. It can only be prevented.

The environmental crisis arises from a fundamental fault: our systems of production - in industry, agriculture, energy and transportation - essential as they are, make people sick and die.

If you ask what you are going to do about global warming, the only rational answer is to change the way in which we do transportation, energy production, agriculture and a good deal of manufacturing. The problem originates in human activity in the form of the production of goods.

My entry into the environmental arena was through the issue that so dramatically - and destructively - demonstrates the link between science and social action: nuclear weapons.