We’ve all seen the concepts acted out on television, heard them reported on the radio, and read about them in newspapers and magazines. We even get them preached to us by our children when they come home from school. Conserve energy. Carpool. Use less water. Recycle. Save the planet. These and other such slogans have become increasingly popular in recent years, as more and more people have become convinced that our world and its life-sustaining support systems are seriously threatened by the ever-increasing numbers of our species. As a result, protecting the environment has become a key consideration in almost all that we do; for it is put forth as a self-evident fact that being good to the earth is the only way to ensure that our children and grandchildren will inherit a world that provides equal or greater opportunities and resources than that in which we now live.