hard-coal
71hard — {{Roman}}I.{{/Roman}} adj. 1 solid/stiff VERBS ▪ be, feel, look, seem ▪ The chairs felt hard and uncomfortable. ▪ become, go …
72coal — [[t]ko͟ʊl[/t]] ♦♦♦ coals 1) N UNCOUNT Coal is a hard black substance that is extracted from the ground and burned as fuel. Gas fired electricity is cheaper than coal... Today, oil and natural gas have replaced coal and wood in most areas. 2) N… …
73coal*/ — [kəʊl] noun 1) [U] a hard black substance that is dug from the ground and burned as fuel a piece/lump of coal[/ex] the coal industry[/ex] 2) coals [plural] pieces of burning coal …
74Hard commodity — A hard commodity is a commodity such as metals, crude oil, or coal. This term generally refers to commodities that are mined, rather than grown.ee also*Soft commodity …
75hard-rock mining — /ˈhad rɒk maɪnɪŋ/ (say hahd rok muyning) noun the mining of hard ores such as those which contain gold, nickel, zinc, etc., as opposed to soft rock mining for coal, shale oil, etc …
76History of coal mining — Due to its abundance, coal has been mined in various parts of the world throughout history and continues to be an important economic activity today. Compared to wood fuels, coal yields a higher amount of energy per mass and could be obtained in… …
77Peak coal — is the point in time at which the maximum global coal production rate is reached, after which, according to the theory, the rate of production will enter to a terminal decline. Coal is a fossil fuel formed from plant matter over the course of… …
78Stone coal — Stone Stone, n. [OE. ston, stan, AS. st[=a]n; akin to OS. & OFries. st[=e]n, D. steen, G. stein, Icel. steinn, Sw. sten, Dan. steen, Goth. stains, Russ. stiena a wall, Gr. ?, ?, a pebble. [root]167. Cf. {Steen}.] 1. Concreted earthy or mineral… …
79Soft coal — Soft Soft (s[o^]ft; 115), a. [Compar. {Softer} (s[o^]ft [ e]r); superl. {Softest}.] [OE. softe, AS. s[=o]fte, properly adv. of s[=e]fte, adj.; akin to OS. s[=a]fto, adv., D. zacht, OHG. samfto, adv., semfti, adj., G. sanft, LG. sacht; of… …
80soft coal — n. BITUMINOUS COAL * * * in the United States, bituminous coal (q.v.), as opposed to hard coal, or anthracite. In Europe the designation soft coal is reserved for lignite and brown coal (qq.v.), whereas hard coal means bituminous coal. * *… …
