During the 1950s and 1960s, the U.S. Army conducted atmospheric dispersion tests in many American cities using fluorescent particles of zinc cadmium sulfide (Zn

This report begins by providing an overview of demographic modeling, including the strengths and weaknesses of this technique. Then the elements of the model ar

Determining the health risks to humans of exposure to toxic substances in the environment is made difficult by problems such as measuring the degree to which pe

In the early 1980s, two water-supply systems on the Marine Corps Base Camp Lejeune in North Carolina were found to be contaminated with the industrial solvents