Assertion: radon's level | /r/CapableOf | test for radon
Facets:
Source sentences:
text: Because high levels of radon have been found in every state of the United States, testing for radon and installing radon mitigation systems has become a specialized industry since the 1980s.
text: Because high levels of radon have been found in every state of the United States, testing for radon and installing radon mitigation systems has become a specialized industry since the 1980s.