noun
Technical term for a type of coal with high volatile content, used in industry and power generation.
黒炭は瀝青炭とも呼ばれ、発電に使われる。
Bituminous coal, also called 瀝青炭, is used for power generation.
Lignite, a lower-grade brown coal.
Compound of 黒 (black) and 炭 (charcoal/coal), describing its dark appearance.