Assertion: radon | /r/AtLocation | the environment
Facets:
value: naturally
type: MANNER
Source sentences:
text: "Radon is a colourless, odourless radioactive gas found naturally in the environment.
text: Radon is a radioactive gas that occurs naturally in the environment by seeping out of rocks and soil.
text: Radon is a colourless, odourless radioactive gas found naturally in the environment.
text: Radon is a radioactive gas found naturally in the environment.
text: Radon is a radioactive gas found naturally in the environment.
text: Radon occurs naturally in the environment as a result of decay of radioactive elements in the soil and it can accumulate in houses built on areas where such decay occurs.
text: It occurs naturally in the environment and can be harmful.