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This twenty page booklet categorizes air pollutants, where they come from & what they do. Diverse topics such as air quality trends, forest decline, effects on human health, acid deposition (acid rain), & the greenhouse effect, all of which have air pollution as a common thread, are covered in detail. Control technologies & what you can do to prevent air pollution also included. Written by Jon Luoma, the booklet is illustrated in two color line drawings by Brent Copp, under the art direction of Homer Eclov. Photography by Richard Hamilton Smith. Classroom sets & prices available upon request. Send SASE.