Excerpt from Energy and Environmental Stress in Aquatic Systems: Selected Papers From a Symposium Held at Augusta, Georgia, November 2-4, 1977The rapid proliferation in the past few years of studies of the environmental impact resulting from the procurement, conversion, burning, and disposal of coal is indicative of the reemerging importance of this energy source in many industrial nations. Gehrs concludes from a literature review of studies on organic contaminants produced by conversion of coal to hydrocarbon com pounds with higher hydrogen-to-carbon ratios, that toxicological investigations of individual compounds can be made manageable by first grouping the compounds on the basis of chemical structure and then studying representative compounds. Schultz, Dumont, and Kyte demonstrate that a 2% concentration of untreated coal-conversion gasifier condensate decreased motility and increased cell lysis in a ciliate protozoan. The procurement of coal can result in acid mine pollution, which has been demonstrated to reduce severely species richness of invertebrate communities in Ohio streams (hummon et al.) but to have a much lesser impact on Colorado streams (ward, Canton, and Gray).About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.