Definition: Natural gas

Category: Transport

Natural gas consists mainly of methane occurring naturally in underground deposits, associated with crude oil or gas recovered from coal mines (colliery gas). http://ec.europa.eu/eurostat/ramon/statmanuals/files/KS-BI-03-002-__-N-EN.pdf
Source:
Glossary For Transport Statistics, Eurostat, ECMT, UN/ECE, Third edition
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