Coal that is dark and sooty, often used in reference to a type of fuel or a pollutant.

A term describing coal that produces a lot of soot when burned.

धुंआ छोड़ने वाला कोयला

English Usage: The sooty coal burned in the fireplace left a thick residue on the chimney.

Hindi Usage: अंतिर पक्की के में जलाया गया काला कोयला चिमनी पर मोटा अवशेष छोड़ गया।