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Textbook. Grade levels 6, 7, 8.
Trefil, a leading scientist, is certainly qualified to tackle the controversial, timely topic of how humans ought to affect the planet they live on. He argues that from the dawn of an agricultural society, man has always engineered nature to suit his needs. And because we're the only form of life with the ability to move mountains (as much literally as metaphorically), there's no rational reason not to manage the environment
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