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Also known as carbone

Coal is a combustible black or brownish-black sedimentary rock, formed as layers called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. It is a fossil fuel, formed when plants decay into peat which is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits formed from wetlands called coal forests that covered much of the tropics during the late Carboniferous and early Permian.

AI overview

Coal is a dark, combustible rock formed from ancient plants that decayed into peat and were transformed by heat and pressure over millions of years, composed mainly of carbon along with hydrogen, sulfur, oxygen, and nitrogen. It matters because it is a fossil fuel that has historically been a major energy source, though vast deposits from prehistoric tropical wetlands took millions of years to form and are now being consumed much more rapidly than they were created.

AI-generated from the Wikipedia summary — may contain errors.