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General Science Elements Metals - Discussion Page For Q.1469 | General Knowledge Questions and Answers | General Knowledge Free Online-Tests | LucentBlackBoard | LucentBlackBoard.com
Q: Which is the metal that pollutes the air of a big city?
A. Lead B. Copper
C. Chromium D. Cadmium

Answer and Explanation

Answer:Lead

Explanation:
There is no explanation...

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