ABSTRACT
Pollution we define to be any stock or flow of physical substances that impairs man's capacity to enjoy life. So defined, pollution is a pervasive phenomenon. Physical garbage; air and water pollution, soil exhaustion via excessive use, D.D.T., radiation, and the running down of any natural resource faster than it can rejuvenate itself (if it can rejuvenate itself), are all problems of pollution in this extended sense. By operating at such an all inclusive level we may miss some of the interesting aspects of particular pollutants. We hope to gain in return by illuminating the conceptual similarities among apparently diverse problems.
