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Chemistry miscellaneous
  1. Of the following which one pollutes the air of a big city ?
    1. Copper
    2. Chromium
    3. Lead
    4. Calcium
Correct Option: C

Lead pollution primarily came from cars in the past. Today, lead pollution primarily comes from lead smelters, metal processing plants and incinerators. Deposits of lead in soil can harm both humans and animals by absorbing it into a body.


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