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This detailed guide to water and the natural processes it goes through is an ideal complement to the National Curriculum. It studies the different states of water in nature and its fundamental importance before examining how human activity can interfere with the natural process. Packed with detailed photographs and diagrams it provides both clear and fascinating coverage of the subject. Numerous activities encourage readers to explore aspects of the water cycle for themselves. And a topic web and cross-curricular activity ideas provide teachers with additional resources. A re-issue of one of a popular series.