Assertion: nutrient pollution | /r/CreatedBy | excess nitrogen
Facets:
value: in air
type: LOCATION
value: in water
type: LOCATION
Source sentences:
text: Nutrient pollution, caused by excess nitrogen and phosphorus in water or air, is the number-one threat to water quality worldwide and can cause algal blooms, a toxic soup of blue-green algae that can be harmful to people and wildlife.
text: Nutrient pollution is one of America's most widespread, costly and challenging environmental problems, and is caused by excess nitrogen and phosphorus in the air and water.