Assertion: radon | /r/CapableOf | accumulate to level
Facets:
value: in homes
type: LOCATION
Source sentences:
text: However, in areas without adequate ventilation, such as underground mines, radon can accumulate to levels that substantially increase the risk of lung cancer .
text: Radon gas usually exists at very low levels outdoors, however, in homes radon can accumulate to levels that substantially increase the risk of lung cancer and other disease.