Assertion: acid rain's ph | /r/HasProperty | less than 5.6
Facets:
Source sentences:
text: Acid rain is rainfall whose pH is less than 5.6, the value typically observed, due to the presence of dissolved carbon dioxide.
text: Acid rain is defined as any form of wet precipitation (rain, snow, fog, dew or sleet) that has a pH less than 5.6 (on a scale of 0 to 14, with 7 being neutral).