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.

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.

Teddy Roosevelt of course was a great outdoorsman all his life.

There is no domestic issue more important to America in the long run than the conservation and proper use of our natural resources, including fresh water, clean air, tillable soil, forests, wilderness, habitat for wildlife, minerals and recreational assets.

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

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.

Franklin Roosevelt was very concerned about environmental issues.