A well-reasoned, readable diagnosis of air pollution: its causes, effects, possible cures. After an arresting introduction--a moth that grew darker from generation to generation until it matched the smoky air--the author traces the increase of pollution from the first fire until ""the Industrial Revolution improved the standard of living and lowered the standard of the air."" A series of disasters followed and with them the grudging recognition, explained in scientific detail here, that the supply of air is not unlimited. What pollution is doing to people, to animals, to plants, to products--what it may do to the very climate--precedes a survey of methods of combating it, with emphasis on the low cost and availability of controls and equal emphasis on citizen participation. For youngsters of intermediate age, a full, self-contained presentation of a topical topic from a reliable source.