# coal

> combustible sedimentary rock composed primarily of carbon

**Wikidata**: [Q24489](https://www.wikidata.org/wiki/Q24489)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Coal)  
**Source**: https://4ort.xyz/entity/coal


## References

1. Iowa State University Library Vocabularies
2. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=30888)
3. [Source](https://www.britannica.com/science/coal-fossil-fuel)
4. Nuovo soggettario
5. Freebase Data Dumps. 2013
6. [Source](https://www.un.org/fr/climatechange/science/causes-effects-climate-change)
7. [Source](http://datos.bne.es/tema/XX525141.html)
8. Integrated Authority File
9. BBC Things
10. YSO-Wikidata mapping project
11. BabelNet
12. [Environment Ontology](https://raw.githubusercontent.com/INCATools/environments2wikidata/master/matches/curated-high-confidence-envo.tsv)
13. UMLS 2023
14. ASC Leiden Thesaurus dataset of 5 June 2018
15. National Library of Israel
16. CC 6
17. KBpedia
18. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)