21st century debates

Examines the issue of water scarcity, discussing the importance of water and the problems caused by its lack, and looks at what can be done to handle increasing demands for water.

Describes the issue of waste, including waste types, disposal, and costs; methods, payoffs and problems of reduction, reuse, and recycling; and attitudes about waste management and the environment. Also includes a glossary and lists of related organizations, books, and Web sites.

Explores the debates surrounding air pollution, discussing its causes and prevention.