Contends that the traditional approach to the economics of pollution deals only with the special case of damage coming from the per-period flow of the pollutant. Examines the limitations of the traditional flow approach. Summarizes fundamental advances in the economic theory of stock pollutants using graphical descriptions. (CFR)

Intended mainly for use in the intermediate grades, this document provides demonstrations, field trips and laboratory experiences designed to help students investigate the role that people play in problems associated with environmental quality, pollution, and ecology in general. The book was developed as an alternative program to the regular sixth…

Presents the results of a field study done on 7 wells providing 37% of the total aquifer production for 4 municipalities in Puerto Rico. Each sampled well showed signs of contamination by heavy metals, nitrate, and semivolatile organic compounds. Although found in low concentrations, current development threatens groundwater quality. (MJP)