Environmental

Radon is a naturally occurring radioactive gas that enters buildings from:

AOld lead pipes in the water supply

BDecay of uranium in the soil beneath the structure✓ Correct

CFormaldehyde off-gassing from building materials

DIndustrial chemicals in the groundwater

Explanation

Radon is a colorless, odorless, radioactive gas that forms from the natural decay of uranium in soil and rock. It can seep into buildings through foundation cracks and openings and is the second leading cause of lung cancer in the U.

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Local government regulations that control land use by dividing areas into zones specifying permitted uses, building sizes, and densities.

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Official permission to use land in a way that does not conform to the applicable zoning ordinance, granted by a zoning board when strict enforcement would cause undue hardship.

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The power of government to take private property for public use, with the requirement to pay the owner just compensation.

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A doctrine by which a person can gain legal title to another's land by openly, continuously, and adversely occupying it for a statutory period.