Oil shale

https://www.wikidata.org/wiki/Q221378

Field Hierarchy

Parent
Biology 34.8M papers	Engineering 23.9M papers	Geology 9.1M papers	Paleontology 5.3M papers
Waste management 1.5M papers
Current
Oil shale 60k papers
Child
Shale gas 9,072 papers	Unconventional oil 6,907 papers	Shale oil 6,063 papers	Tight oil 3,898 papers
Shale oil extraction 1,350 papers	Oil shale gas 1,333 papers	Shell in situ conversion process 1,082 papers	Green River Formation 1,035 papers
Synthetic crude 1,009 papers

Trends

Notes

History