Fossil fuel

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

Field Hierarchy

Parent
Biology 36.5M papers	Chemistry 29.4M papers	Engineering 25.5M papers	Organic chemistry 13.1M papers
Ecology 8.2M papers		Waste management 1.6M papers
Current
Fossil fuel 103k papers
Child
Energy source 11.5k papers	Unconventional oil 7,732 papers	Shale oil 6,795 papers	Renewable fuels 5,832 papers
Coal liquefaction 4,670 papers	Oil and natural gas 2,009 papers	Midstream 1,778 papers	Oil shale gas 1,592 papers
Natural gas industry 1,540 papers		Shale oil extraction 1,508 papers

Trends

Notes

History