Earth's life-enabling atmosphere, unique in the known universe, is the topic of this engaging title. Readers will learn about the atmosphere's layers, composition, and evolution. the atmosphere's role in creating weather is explained, with topics such as atmospheric pressure, cloud formation, and precipitation clearly addressed. Readers will also learn about the greenhouse effect, as well as the problematic effects of air pollution. Curious minds will be enthusiastic to discover why the sky is blue and what other planets' atmospheres are like. an information-packed, accessible resource on an important Earth science topic.