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

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)

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)

Nonpoint source pollution, water pollution not released at one specific identifiable point, now accounts for 50 percent of the nation's water pollution problem. Runoff is the primary culprit and includes the following sources: agriculture, mining, hydrologic modifications, and urban runoff. Economics, legislation, practices, and management of this…

Maximum levels of the principle water contaminants are discussed in this article. Difficulties related to establishing standards for contaminants in drinking water are identified and the possible results of high levels of these contaminants included. (MA)

As food producer for much of the world, the United States will soon have to decide between the continuation of present farming practices or the initiation of new policies that will improve environmental quality while reducing food production. This article discusses the consequences of either choice and offers possible alternatives. (MA)

This article focuses on the environmental benefits of recycling mainly iron and steel, as well as the current status of such recycling processes. It also examines some of the economic constraints working against recycling, and offers suggestions for correcting the problem. (Author/MA)

Since the 1940's, Operation Bootstrap, an economic development program, has changed Puerto Rico from an undeveloped country to one with increasing energy demands, decreasing natural resources, and alarming environmental degredation. The Puerto Rican government is presently supporting high-energy industrial facilities without regard to…

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)

Reviews the pollution control history of the River Thames since the time of the Roman occupation. Particular emphasis is given to the restoration policies of the last thirty years. By 1950, the waters of the Thames were nearly devoid of wildlife. Today, the river is one of the world's cleanest. (MA)

Included are (1) a discussion of ozone chemistry; (2) the effects of nitrogen fertilizers, fluorocarbons, and high level aircraft on the ozone layer; and (3) the possible results of a decreasing ozone layer. (MR)

Assesses the scope of technological hazard burden in the United States. Discusses the technological impacts on ecosystems and reviews technological hazards in an historical perspective. (MA)

Examines models for hazard management and the constraints associated with them. Suggests ways of improving hazard management. (MA)