Assertion: mercury | /r/HasProperty | unwanted impurity
Facets:
value: in minerals
type: LOCATION
value: in raw materials
type: LOCATION
value: in fossil fuels
type: LOCATION
Source sentences:
text: Much is released unintentionally from processes where mercury is an unwanted impurity.
text: unintentionally, from processes where mercury is an unwanted impurity in raw materials, minerals and fossil fuels, particularly coal; and