A selected public health bibliography with annotations.

We know little of the nature and magnitude of our actual environmental difficulties. The current wave of public concern has been aroused in large measure by scientists who have occasionally exaggerated the all-too-genuine deterioration of the environment or have overenthusiastically made demands which, unnecessarily, exceed realistically realizable-or even desirable-expectations. The nations of the world may yet pay a dreadful price for the public behavior of scientists who depart from fact to indulge in hyperbole.-PHILIP HANDLER, President, NATIONAL ACADEMY OF SCIENCES, 1970.