Assertion: fluoride | /r/AtLocation | soil
Facets:
value: naturally
type: MANNER
Source sentences:
text: Fluoride is a naturally occurring mineral that exists in fresh water, sea water and soil.
text: It’s found naturally in soil, air, and water.
text: It’s important to distinguish that while fluoride (calcium fluoride) is a natural mineral found in soil and water, these studies examined levels of hydrofluorosilicic acid, a pollutant produced through phosphate mining.
text: The natural version of fluoride found in the soil is known as calcium fluoride (CaF2).