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)

Examines the increasing hazardousness of places as a consequence of natural disasters, technological failures, and chronic environmental degradation on a global scale. Describes the trends and impacts of environmental hazards, including their frequency, magnitude and damage on both a regional and international scale. (MJP)