After summarizing the ecology of polluted streams as well as the technology and biology of sewage treatment methods, and considering the economic and social aspects of introducing advanced sewage treatment, comments on the role of biology teachers in providing public information are made. (AL)

Pollution: Its past, present, and future. (Editor)

A. W. Smith gave testimony in answer to questions posed by Representative Henry S. Reuss, Chairman of the House Conservation and Natural Resources Subcommittee. Hearings were held in February 1970 to elicit views on programs necessary to attain a healthy environment. (Author/SD)

Based on a paper given at the annual conference of the Association for Supervision and Curriculum Development, March 17, 1969, in Chicago.

Discusses the thermodynamics of heating and boiling water, including the mechanics of bubble formation. Indicates that when salt was added to boiling water (when cooking pasta) the water temperature rose less than a degree, concluding that salt serves only as a seasoning. (Author/JN)

The existence of several different approaches to teaching water relations is noted, arguing that the concept of water potential is the most useful basis for this approach. The meaning of water potential is discussed, and a means of introducing it and using it to explain cell water relations is outlined. (Author/JN)

Outlines a laboratory procedure which enables students to evaluate the contamination potential of surface impoundments and apply basic principles of hydrogeology to the land disposal of waste material. Includes a list of materials needed and directions for the instructor. (Author/DC)

Describes a simple outdoor pumping experiment that can illustrate basic concepts of hydrology to college students in an introductory earth science course. (Author/WB)

The seven classroom learning stations described in this article are designed to teach intermediate grade students about air, water, and noise pollution. Some resource books are listed. (SJL)

Underground geothermal water from an artesian well supplies heat for rural Haakon School District in Philip (South Dakota). The same water is then piped to the downtown business district a few blocks away and sold as fuel to participating merchants. (Author/MLF)

There is an increased need for well-planned and well-executed water management programs when cooling systems are operated part-time or on partial load. (Author/MLF)

Presents an overview of the educational programs, concerts, and other activities which take place aboard the 76-foot sloop "Clearwater" in a privately-funded effort to bring New York's Hudson River closer to the people. (WB)

Presented are the basic principles of personnel recruitment and employment for the water pollution control field. Attention is given to determination of staffing requirements, effective planning, labor sources, affirmative action, and staffing policies. (CS)