Explains why the earth's protective ozone layer is shrinking, discusses the impact of the additional ultraviolet radiation coming through the atmosphere, and describes steps being taken to understand and alleviate the problem.
Presents, through text and photographs, 140 of the most popular animals of the world, highlighting their physical characteristics, behavior and habitat.
Introduces the life cycle, feeding habits, migration, predators, and mating of monarch butterfly through the observation of one particular monarch named Danaus.
Desribes petroleum and its uses, examines the harmful affects of oil spills, and discusses how such environmental disasters can be cleaned up or prevented.
