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Eighteen map spreads highlight the damage pollution has done to our world.

A geographic survey of the earth's grasslands, their climate, and their ecological importance.

Briefly describes some of the dangers caused mainly by humans for such animals as otters, sea turtles, seals, penguins, polar bears, and whales.

Discusses research and theories concerning the earliest human beings.

Describes how archaeologists trace the development of the human race from fossils, skeletons, cave drawings, and artifacts found around the world.

Analyzes the roles of microorganisms, plants, animals, and humans in the biogeochemical cycle, highlighting the ways in which humans are harming the environment and exploring what can be done to help maintain balance in the biosphere.

Provides an analysis of the planet's current state of health and looks at the dangers to Earth's natural "lifesupport" systems.

Examines the distinctive features of deserts and discusses various peoples who live in that harsh environment.

Beaver, Bear, Deer, and other animals speak about their lives in the wild and their relationship with humans.

Discusses the adverse impact of development and other activities on the ecology of tropical forests, and considers the consequences of large-scale deforestation.