Discusses air and water pollution problems resulting from sulfur in the environment. (MDR)

PCB's are one of the most persistent chemicals ever introduced into the environment by man. From very early in their history of manufacture PCB's were suspected of being hazardous to health, but public awareness of the hazard was slow in coming. (RE)

The environmental toxicology of mercury is discussed. Sources, effects, levels, and standards of mercury in the air are given. (BB)

Concerned with the lack of consistency in reporting air pollution levels, a task force developed the Pollutant Standards Index. This index is intended for voluntary use by state and local pollution control agencies and is specifically designed to inform the public through the news media. Details of index are given. (MA/Author)

A national commitment was made a decade ago to repair the damage industrial society had wrought on the physical surroundings. That commitment left unanswered what technical methods should be employed in the repair job. This article discusses the problems faced by the environmentalist and the industrialist concerning a coal policy. (Author/MA)

Explores problems and doubts regarding the extent to which air pollution must be reduced to eliminate further suffering and death. The adequacy of our present approach to air pollution control is evaluated together with an assessment of unknown factors affecting standards for a healthful environment. (BL)

This article identifies the cumulative effects of some environmental problems facing mankind and presents possible alternative futures. The author discusses the pervasive infiltration and detrimental effects in the biosphere of polychlorinated biphenyls, the recent increase in acid rain, the loss of tropical rain forest lands, and future energy…

A review of the environmental problems identified on Earth Day 1970 is presented. Problems on conspicuous consumption, combustion of fossil fuels, and toxic substances are discussed. (SMB)

Children are especially sensitive to air pollution and consequences to them maybe of longer duration than to adults. The effects of low-level pollution on children are the concern of this article. The need for research on the threat of air pollution to childrens' health is emphasized. (BT)

Described are the patterns of air pollution in certain large urban areas. Persons in poverty, in occupations below the management or professional level, in low-rent districts, and in black population are most heavily exposed to air pollution. Pollution paradoxically is largely produced by high energy consuming middle-and upper-class households.…

This article is the first of three articles in a series on the acid rain problem in recent years. Discussed are the causes of acid precipitation and its consequences for the abiotic and biotic components of the terrestrial and aquatic ecosystems, and for man-made materials. (Author/SA)

Discusses magetohydrodynamics (MHD) and its potential use in coal powered electric generating plants. Considered are its advantages, problems, environmental effects and development in Russia. (MDR)