The age of innocent faith in science and technology may be over.

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

Environmental concern is now firmly embedded in public life: in education, medicine and law; in journalism, literature and art.

Finally, since human beings are uniquely capable of producing materials not found in nature, environmental degradation may be due to the resultant intrusion into an ecosystem of a substance wholly foreign to it.

In general, any productive activity which introduces substances foreign to the natural environment runs a considerable risk of polluting it.

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.