Assertion: acid rain's ph level | /r/HasProperty | acidic
Facets:
value: mildly
type: DEGREE
value: in nature
type: LOCATION
value: slightly
type: DEGREE
Source sentences:
text: Normally clean and safe rain contain pH level between 5.0 to 5.5 which is slightly acidic in nature however it can be acidic due to the mixing of harmful acidic constituents.
text: A pH level of 0 to 7 is considered acidic; 7 is neural; and a level above 7 is alkaline.
text: Natural rainfall should have a pH level around 5.6, which is mildly acidic but not considered harmful.