16. _______ is a naturally occurring gas that's found in most soils and rocks and can cause lung cancer. A. Radon B. Hydrogen C. Nitrogen D. Carbon monoxide
Radon is a naturally occurring gas that's found in most soils and rocks and can cause lung cancer.
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Asked 1/18/2019 10:18:00 AM
Updated 1/8/2020 3:19:39 AM
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