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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
kota počivali
Energy; Coal
Kota, meri do obzorja, po katerem usedlinah ali material bo diapozitiv ali padec.
Tavan Tolgoi
Energy; Coal
Tavan Tolgoi leži na jugu puščave Gobi v Mongoliji in je največje neizkoriščeno nahajališče koksnega premoga na svetu, ki je bilo ocenjeno na 6 milijard ton premoga, ki se uporablja za izdelovanje ...
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