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.

Technologists practice faith too; 'Faith that problems have solutions before having the knowledge to solve them.'

I see no reason to have my shirts ironed. It's irrational.

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

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

The first law of ecology is that everything is related to everything else.

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.