Provides multiple entries on the subject of water in four volumes which are alphabetically-arranged, and focues on hydrology, geology, chemistry, ecology, environmental science, and other related topics.
Argues that the Clean Water Act of 1972 has done its job in limiting the number of industrial pollutants going into the country's waterways, but that approximately one-third of America's stream miles and lake areas are still polluted due to man's disruption of the natural water cycle.
Explores the science of water, discussing the properties of water, the importance of water, the characteristics of freshwater and salt water, water in the solar system, and conservation concerns. Includes a glossary.
Summarizes where water is found on Earth, including lakes, icebergs, and a garden hose, and introduces related concepts such as how to find water on a map and facts such as how high the highest waterfall is.
Photographs and text introduce students to the structure and function of the earth's hydrosphere, describing what it does, how it impacts the planet, and what role it plays in the universe.
