This article was adapted by Ron Cowen from an article written by Dr. F. Sherwood Rowland for Beyond DiscoveryTM :The Path from Research to Human Benefit, a project of the National Academy of Sciences. The Academy, located in Washington, D.C., is a society of distinguished scholars engaged in scientific and engineering research, and dedicated to the use of science and technology for the public welfare. For over a century, it has provided independent, objective scientific advice to the nation.
