Summarizes the theory that as human cultures evolve, they will, unless destroyed by some prior event, ultimately destroy themselves by exhausting their essential resources, by damaging their ecology until it will not sustain them, or both." (Author/AL)

Population, depleted resources, pollution and other environmental issues are reviewed from an international perspective. The imperative nature of world-wide cooperation is emphasized for dealing effectively with ecological problems. Directions in which this cooperation should be effected are presented. (JP)

Provides facts which dispel widely held fallacies about the consequences of coal-burning, most of which are physics-related. Concentrates on air pollution as the major contributor to the public hazard from coal-burning. (GA)

A discussion of man's role in controlling the environment is presented. An optimistic picture of the future is given with regard to this control. (JP)

Presents a concise and interesting overview of U.S. attitudes towards nature, conservation, and environmental issues. Traces the constantly shifting relationship between these issues and social and commercial interests. Follows this relationship from the early colonists to the current environmental movement. (MJP)