Describes the risks and damage caused to air, soil, and wildlife by wastes from factories and cities and examines the conservation work that has tried to stem this downward ecological slide
Explains how the growth of industry in modern times has brought about the pollution of air, water, and land, as well as the depletion of natural resources, and emphasizes the importance of conservation
Explains how the growth of industry in modern times has brought about the pollution of air, water, and land, as well as the depletion of natural resources, and emphasizes the importance of conservation.