Examines the devastating effects of forest fires and the various techniques used to combat and prevent them.

Explains what species are, how they become extinct, and the effect of extinction on the ecology; surveys endangered species of plants and animals and possible solutions.

Examines the increasing problem of hazardous waste disposal in our society.

Presents an overview of the history of capital punishment, theories on the causes of crime and the deterrent effects of punitive actions, and the moral and legal principles involved.

A biography of the opera and concert singer who, among other achievements, was the first black soloist to perform with the Metropolitan Opera Company in 1955.

Discusses the ethical and moral issues surrounding euthanasia, genetic engineering, genetic counseling, organ transplants, and other medical technologies.

Discusses the investigation into the Challenger catastrophe, the reshaping of NASA, the debate over manned versus unmanned space flights, and the future possibilities for commercial enterprises in space.

Traces the history of the development of the artificial heart, including experimentation with animal and human heart transplants, and discusses the psychological and ethical issues surrounding their use.

Discusses the advantages and disadvantaged of using the non-renewable fossil fuel coal as a major energy source now and in the future.

Describes and analyzes the stresses and strains on urban systems in the United States and the decline of living conditions in many of them. Also suggests some factors that make certain cities desirable places to live.