Air pollution is not merely a nuisance and a threat to health. It is a reminder that our most celebrated technological achievements-the automobile, the jet plane, the power plant, industry in general, and indeed the modern city itself-are, in the environment, failures.

All of the clean technologies are known, it's a question of simply applying them.

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

After all, despite the economic advantage to firms that employed child labor, it was in the social interest, as a national policy, to abolish it - removing that advantage for all firms.

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.

Nothing can survive on the planet unless it is a cooperative part of larger global life.

In nature, no organic substance is synthesized unless there is provision for its degradation; recycling is enforced.