Discusses analysis of trace gases in air by photoionization mass spectrometer. It is shown that the necessary sensitivity can be obtained by eliminating the UV monochromator and using direct ionization with a hydrogen light source. (JP)

Investigative reporting on environmental issues requires technical knowledge and often the adoption of controversial stances on the issues. Discussed are the problems created by both aspects of this type of reporting in relationship to developing adequate news coverage. (JP)

The definition of a production function and the characteristics of an abstract technology are related to the practices economists have used in designing models for explaining technological change. It is found that all models of technological change have sought to account for the change rather than explain it. (Author)

Article lists and explains the three groups that comprise the ecological family and which are designed to help children take a first step toward discovering the real meaning of ecology. (Author/RK)

Report of a study of airborne micro-organisms collected over the Oklahoma City Metropolitan area and immediate environments, to investigate the possibility that a cloud of such organisms might account for the prevalence of some respiratory diseases in and around urban areas. (LK)

Convinced that conservation education means more than just preserving and protecting natural resources, the author stresses the need to develop a "conservation conscience in people through direct experience with nature. Suggests greater emphasis on outdoor education, field trips, school camps and the use of nature centers. Bibliography. (LC)

Reviews environmental studies which show that national climatic fluctuations vary over a wide range. Solar radiation, earth temperatures, precipitation, atmospheric gases and suspended particulates are discussed in relation to urban and extraurban effects. Local weather modifications and attempts at climate control by man seem to have substantial…

Major consequences of present and additional environmental quantities of DDT pesticide are predictable by mathematical models of transport, accumulation and concentration mechanisms in the Wisconsin regional ecosystem. High solubility and stability produce increased DDT concentrations at high organism trophic levels within world biosphere…

Describes the development and implementation of a program in which students in Portland, Oregon, learn about architecture, urban history, and urban growth by exploring the city, studying its buildings, examining social, political, and economic influences on the environment, speaking with people in the neighborhoods, and using city resources. (MJL)

This study examines the ways in which neighborhoods as physical environments affect children's play and play patterns. Four urban neighborhoods were examined for terrain, access to play space, social interaction, locus of play, safety, and mobility. It was found that children's play patterns are influenced by the environment they live in. (DS)

Describes eruption steps in Mt. St. Helens' top surface deformation: constant shaking of earthquakes, minor steaming from vents, and sudden catastrophic eruption. Explosions caused black projectile-laden ash clouds, vertical white steam clouds, and vertical gray ash-laden clouds. (SK)

Characteristics of the ecological approach to perception are presented. The affordance concept and its relevance is emphasized. Human crowding is discussed in affordance terms. There is a comparison given between present affordance analysis and ecological analysis. (Author/SA)

Data gathered through telephone interviews with Illinois farmers are used to study the adoption of soil conservation practices (operationalization of environmental innovation) and commercial practices. (NQ)