Presents the results of the MacArthur Foundation Study of Aging in America, which show how to maintain optimum physical and mental strength throughout later life.

This report examines the relationships between aging and exposure to environmental agents (including natural and man-made agents, as well as life-style factors). Several relationships must be considered--the impact of intermittent or lifelong exposure to environmental agents on the rate of aging, the impact of lifelong exposure on health status when one reaches more advanced age, and the special response of the aged compared with that of the young when exposed to environmental agents.

First multi-year cumulation covers six years: 1965-70.