03.08.2009
A carbonaceous fuel mined or stripped from the earth, such as petroleum, coal, peat, shale oil, or tar sands
A carbonaceous fuel mined or stripped from the earth, such as petroleum, coal, peat, shale oil, or tar sands
Energy production or conversion by individuals to operate their own plants or equipment
Mining at the surface rather than underground. Coal, iron ore, and phosphates are often extracted by opencast mining