Assertion: acid rain's ph | /r/HasProperty | 5.3
Facets:
Source sentences:
text: It is estimated that around 50,000 lakes in the United States and Canada have a pH below normal (about 5.3 for water).
text: If the pH of a lake drops below 4.8, its plants and animals risk death and it is estimated that around 50,000 lakes in the United States and Canada have a pH below normal (about 5.3 for water).
text: -acid deposition also causes clay soils to release aluminum and magnesium further lowering the pH in some areas; if the pH of a lake drops below 4.8, its plants and animals risk death and it is estimated that around 50,000 lakes in the United States and Canada have a pH below normal (about 5.3 for water); several hundred of these have a pH too low to support any aquatic life