We're going to have to do a whole lot more, and give nature at least a chance to repair some of the damage we've done.

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

Trails are relatively inexpensive. A splendid national network of all kinds of trails can be established at less cost than a few hundred miles of super highway.

The fate of the living planet is the most important issue facing mankind.

If we human beings learn to see the intricacies that bind one part of a natural system to another and then to us, we will no longer argue about the importance of wilderness protection, or over the question of saving endangered species, or how human communities must base their economic futures - not on short-term exploitation - but on long-term, sustainable development.

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.

It was truly an astonishing grassroots explosion, ... The objective was to get a nationwide demonstration of concern for the environment so large that it would shake the political establishment out of its lethargy.