This paper is concerned with problems in assessing the behavior of trace substances introduced into natural systems, sampling models of five classes that might be used in the study of contaminants are reviewed. Adaptation of an industrial experimentation method and techniques used in economic geology to ecological sampling is recommended.…

This article describes how a number of international organizations are tackling many different problems of toxic substances in the environment. (BB)

To meet energy needs, the World's energy base must be broadly diversified. This diversification, including such possibilities as fossil fuels, nuclear, solar, geothermal, tidal and aeolian energy, must proceed without undue environmental damage and be economically feasible. Compromises between energy, economics and the environment will have to be…

Spill control methods have been developed to control, treat and monitor spills of hazardous materials during their manufacture, transport, and storage. Spills on both land and water, and methods of treatment and control in these environments were studied. A discussion of detection and monitoring equipment and protective clothing concludes this…

A critical review is made of the literature linking DDT to harmful effects on animal life. Implications of a ban on the use of DDT are discussed and studies which have found relatively no harmful effect on non-insect life are cited. (JP)

According to Rall, director of NIEHS, the agency is supporting environmental research in the areas of occupational health, epidemiological, carcinogenic and biochemical toxicology, air pollution, food additives and nutrition. Rall's concern is that environmentalists have become sidetracked by the problems of esthetics and wildlife toxicity and…