Coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Industry: Energy

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Coal

kol klass

Energy; Coal

Denna klassificering avser kol kvalitet och använda.

kassering av naturgas

Energy; Coal

Avlägsnande av naturliga, syntetiska eller kompletterande gas, eller komponenter eller gasformiga blandningar däri, från svara företagets anläggningar inom rapporten staten på något sätt eller för ...