"Research continued in the environmental and health evaluation of products, by products, and effluents derived from shale oil and from processes that convert coal to liquids. The toxic nature of these materials is investigated by using a variety of chemical, physical, biological, and ecological test protocols. Results are presented according to the functional character of the studies, many of which are generic to fossil-energy-derived liquids. The activities in coal liquids evaluation and in shale oil are identified by separate chapters of the report."