Acid rain

https://www.wikidata.org/wiki/Q40178

Field Hierarchy

Parent
Biology 36M papers	Chemistry 28.9M papers	Organic chemistry 12.9M papers	Ecology 8.1M papers
Current
Acid rain 8,118 papers
Child
Industrial smog 0 papers		Elaeocarpus glabripetalus 0 papers

Trends

Notes

History