A fascinating reference clearly explains and illustrates sixty-six primary environmental terms， including acid rain， biodegradable， and wetlands， and describes how Earth's unique balance of life is threatened.，Defines words and terms commonly used in discussing the environment， from "acid rain" to "wetland"A fascinating reference clearly explains and illustrates sixty-six primary environmental terms， including acid rain， biodegradable， and wetlands， and describes how Earth's unique balance of life is threatened.，Defines words and terms commonly used in discussing the environment， from "acid rain" to "wetland"
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