banuggMarianama banuggMarianama
  • 24-03-2017
  • Geography
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_______ is a naturally occurring gas that's found in most soils and rocks and can cause lung cancer.
a. radon
b. carbon monoxide
c. hydrogen
d. nitroge

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Аноним Аноним
  • 24-03-2017
Radon is a naturally occurring gas that's found in most soils and rocks and can cause lung cancer.
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