Fossil fuel

https://www.wikidata.org/wiki/Q12748

Field Hierarchy

Parent
Biology 36M papers	Chemistry 28.9M papers	Engineering 25M papers	Organic chemistry 12.9M papers
Ecology 8.1M papers		Waste management 1.6M papers
Current
Fossil fuel 100k papers
Child
Energy source 11.4k papers	Unconventional oil 7,606 papers	Shale oil 6,667 papers	Renewable fuels 5,700 papers
Coal liquefaction 4,652 papers	Oil and natural gas 1,989 papers	Midstream 1,721 papers	Oil shale gas 1,573 papers
Natural gas industry 1,534 papers		Shale oil extraction 1,489 papers

Trends

Notes

History