Paved roads and parking lots have contributed to present and projected shortages of fresh water as well as to problems of flash floods. The utilization of porous asphalt paving can help prevent decreasing the reserves of ground water. (Author/MLF)

Alfonso Ortiz, anthropologist, historian, activist, and member of San Juan Pueblo, discusses education in general, bilingual education, the Tewa culture, Indian water rights, tribal sovereignty, the power issues in the Four Corners area, and his book -- "The Tewa World". (NQ)

Summarizes information about salt marshes, including descriptions of their development and structure, details of their values in terms of commercial fishing, stabilization of coastal zones, "reclamation" for grazing and cropfields, recreation and aesthetics. (CS)

Describes a novel demonstration of the acid-base chemistry of the aluminum ion. (DKM)

Describes a convenient method of preparing chlorine water by mixing hydrochloric acid with sodium hypochlorite. (DKM)

Gives a lesson plan for the purposeful introduction of leaf-dwelling organisms to streams of the area in order to study the organisms and indicate the relative health of the stream. Includes organism identification charts. (MKR)

In this study of a 12-year-old boy with autism, mental retardation, and a history of severe gastrointestinal problems, who refused liquids and food, backward chaining was used to shape drinking from a cup and a fading procedure was used to increase the water he was required to drink. (Author/CR)

A community water supply project in Cameroon illustrates the following constraints on community participation in development: paternalistic authorities, prescriptive role of the state, selective participation, bias toward "hard" issues, inattention to negative results, group conflicts, gatekeeping, pressure for immediate results,…

Overexposure to lead can permanently impair a child's mental and physical development. This article discusses sources of lead paint, survey and testing methods, management and abatement plans, drinking water contamination, and associated federal standards. Although lead is present in soil and in art, theater, and vocational programs, no federal…

Discusses recent changes in the Earth's climate. Summarizes reports on changes related to carbon dioxide, temperature, rain, sea level, and glaciers in polar areas. Describes the present effort to measure the changes. Lists 16 references. (YP)

Describes a free online service that can enhance water quality studies by allowing students from across the United States to share data. This telecommunications service from the University of Louisville combines chemistry, biology, environmental science, mathematics, and computer technology into interdisciplinary water quality studies. (JRH)

Some of the threats to internal validity that arise when evaluating the impact of water conservation programs during a drought are illustrated. These include differential response to the drought, self-selection bias, and measurement error. How to deal with these problems when high-quality disaggregate data are available is discussed. (SLD)

Describes an activity for computing the volume of water in a blanket of snow, focusing on measuring and controlling variables, and then using critical thinking skills to analyze data. (HTH)

The problem of monitoring trends for changes at unknown times is considered. Statistics that permit one to focus high power on a segment of the monitored period are studied. Numerical procedures are developed to compute the null distribution of these statistics. (Author)

In this study, a freshwater flatworm was shown to be tolerant to a wide pH range and could survive in acidified water to approximately pH 3.6. The influence of other abiotic factors is explored. (CW)