Describes the forces of erosion as caused by glaciers, water, and wind, how they affect the earth's surface, and how their destructive effects can be prevented
Examines a range of endangered species from rain forest tigers to woodland birds, discussing why they are threatened and what is being done to save them.
Discusses the importance of wetlands, and describes freshwater marshes, wet meadows, intertidal coastal lowlands, the role of decomposition, peatlands, wetlands and the water table, and the policy of "no net loss"