Example image of eyePlorer eyePlorer map for 'Coal': Combustion Sedimentary rock Stratum Anthracite Metamorphic rock Carbon Hydrogen Nitrogen Oxygen Sulfur Fern Physical property Tree Anthropogenic Carbon dioxide Electricity generation Fossil fuel List of countries by carbon dioxide emissions Natural gas Petroleum Coal mining Open-pit mining Biotic material Peat Precursor Pressure Lignite Iron Age Jet (lignite) Sub-bituminous coal Aromatic hydrocarbon Chemical synthesis Bituminous coal Coke (fuel) Space heating Graphite Lubricant Cannel coal Exinite Anno Domini Bronze Age Funeral Great Britain Outcrop Pyre Han Dynasty Neolithic Shenyang England Mining in Roman Britain