Acid rain

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

Field Hierarchy

Parent
Biology 36.8M papers	Chemistry 29.5M papers	Organic chemistry 13.2M papers	Ecology 8.3M papers
Current
Acid rain 8,172 papers
Child
Industrial smog 0 papers		Elaeocarpus glabripetalus 0 papers

Trends

Notes

History