were limited to the very short term. San Francisco: Sierra Club Books, 2008. This aims to make fossil fuels more expensive, thereby reducing their use and the amount of pollution associated with them, along with raising the funds necessary to counteract these factors. 29 Burning coal also generates large amounts of bottom ash and fly ash. Transportation of coal requires the use of diesel-powered locomotives, while crude oil is typically transported by tanker ships, each of which requires the combustion of additional fossil fuels. Halbouty (ed.) Giant Oil and Gas Fields of the Decade, Tulsa, Okla.: American Association of Petroleum Geologists,. Heavy crude oil, which is much more viscous than conventional crude oil, and tar sands, where bitumen is found mixed with sand and clay, began to become more important as sources of fossil fuel as of the early 2000s.
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Artificial gasolines and other renewable energy sources currently require more expensive production and processing technologies than conventional petroleum reserves, but may become economically viable in the near future. The point here, however, is not the specific numbers (it is easy to find more on the Internet) but that these numbers provide a how to incorporate poem lines in an essay rough indication of remaining stocks. All of this energy ultimately derives from sunlight, but as we learned how to use coal (replacing wood as fuel) and then oil and natural gas, there was little concern for energy conservation or for developing rules for limiting energy use. Other forms of transportation, railways and aircraft, also required fossil fuels. We now know that we face an immediate future of global warming, shortages of usable energy, and rising prices. Cheltenham, UK: Edward Elgar, 1999. Fossil fuels that we mainly rely on would include; coal, natural gas, and most importantly, petroleum. The computer industry offers numerous examples of this obsolescence imperative. For each fossil fuel, what is left is all we have.
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