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A referential integrity constraint limits the values of a foreign key.
Cancer
A group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body, characterized by genetic mutations and often requiring complex treatments.
Radon-222
A radioactive gas that is a decay product of uranium, which can accumulate in buildings and increase the risk of lung cancer upon exposure.
Underground Deposits
Natural accumulations of minerals, metals, or other geological resources that are located beneath the Earth's surface, often requiring mining to extract.
Radon-222
A radioactive, colorless, odorless, tasteless noble gas, occurring naturally as an indirect decay product of uranium or thorium, and considered a health hazard due to its radioactivity.
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