coal
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
Coal is formed when ...
Global Energy Monitor
Global Energy Monitor (GEM) is a San Francisco-based non-governmental organization which catalogs fossil fuel and renewable energy projects worldwide. GEM shares information in support of clean energy and its data and reports on energy trends ...