This document is an evaluation and assessment of scientific information relative to determining the health and welfare effects associated with exposure to various concentrations of nitrogen oxides in ambient air. The document is not intended as a complete, detailed literature review. It does not cite every published article relating to carbon monoxide and its effects in the environment. The literature through 1978 has been reviewed thoroughly for information relative to criteria. The major gaps in the current knowledge, relative to criteria, have been identified. Though the emphasis is on the presentation of data on health and welfare effects, other scientific data are presented and evaluated in order to provide a better understanding of the pollutants in the environment. To this end, separate chapters concerning the properties and principles of formation, emissions, analytical methods of measurement, observed ambient concentrations, the global cycle, effects on vegetation and microorganisms, mammalian metabolism, effects on experimental animals, and effects on humans are included.

Distributed to depository libraries in microfiche. "September 1982." Includes bibliographical references.