Other energy sources were from nuclear reactors (19 , natural gas (19 hydroelectric power plants (7 , petroleum (3 , and other renewable energy sources (2 (Kotz , Treichel , and Weaver 257Fossil fuels take thousands of long time to form . Trapped under the earth s surface is a lot of organic matter , which , in combination with temperature , pressure sensation , and available oxygen , decomposes its constituent compounds to hydrocarbons that we use today as energy source . The current cost of other energy sources with equivalent amount of energy is much more dearly-won compared to the extraction cognitive process undergone by fossil fuels . Combustion is the process used to utilize the energy stored in fossil fuels , wherein the fuel burns , yielding CO2 and H2O The energy liberated in the...If you want to get a full essay, enounce it on our website: Orderessay
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