Fossil Fuels
Conventional power stations burn coal, oil or gas to produce electricity. Road vehicles also burn fossil fuel in the form of petrol or diesel, products refined from oil. Coal, oil and gas are called fossil fuels because they form over millions of years through the decay, burial and compaction of rotting vegetation on land (coal), and marine organisms on the sea floor (oil and gas). Burning fossil fuels in this way releases carbon dioxide , a greenhouse gas , which enhances the natural greenhouse effect . Coal is a solid fuel formed over millions of years by the decay of land vegetation. Over time, successive layers become buried, compacted and heated, a process through which the deposits are turned into coal. Coal is widely used in the generation of electricity in power stations because it is a highly concentrated energy source. However, it is not a particularly "clean" fuel, releasing more sulphur dioxide than either oil or gas. Coal was the first fossil fuel to be exploit...