influence on nature

Examines grasslands around the world and the life they support and discusses how they are surviving changes brought about by people and climate.

Traces the development of man and his influence on nature from the Stone Age to the present day.

Describes the technological discoveries and methods that help man cope with the menacing problems of nature but still preserve the ecological balance.

Describes endangered animals of the Caribbean and South America and discusses the effect man has had on this area.