The issues are by some geometric number - 100 or 200 or 500 - times more complicated today than we appreciated them to be when Franklin Roosevelt was around.

The ultimate test of man's conscience may be his willingness to sacrifice something today for future generations whose words of thanks will not be heard.

Nuclear war is not inevitable, but major degradation of our environment with grave consequences is inevitable unless we reverse the trend.

Loads of chemicals and hazardous wastes have been introduced into the atmosphere that didn't even exist in 1948. The environmental condition of the planet is far worse than it was 42 years ago.

The most important environmental issue is one that is rarely mentioned, and that is the lack of a conservation ethic in our culture.

We must recognize that we're all part of a web of life around the world. Anytime you extinguish a species, the consequences are serious.