The primary fuels now used in automobiles, namely gasoline and diesel, are essentially derived from crude oil (petroleum)
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What types of alternative fuels are being explored or used in automobiles today? How ef... - 0 views
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address this question, we will assume that "alternative" refers to those fuels that are produced from a nonfossil source or to those fuels (fossil or otherwise) that would require substantial changes in automotive design or in the distribution and marketing infrastructure.
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proposed a number of compounds--including methanol, ethanol, hydrogen, compressed natural gas (CNG), liquefied petroleum gas (LPG), so-called biodiesel and hydrogen--
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Grolier Multimedia Encyclopedia - 0 views
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basic laws of physics dictate that energy is conserved and can only be changed from one form to another or into matter.
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If the supply of fuel is finite, not only will there be no energy supply when the fuel is exhausted
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coal, oil (petroleum), natural gas, uranium, and fuel wood—is limited and insufficient to sustain rapid rates of development.
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debate about the exact length of time available before the effects of a worldwide shortage become apparent
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geothermal energy, hydroelectric power, peat, ocean thermal energy, solar energy, tidal energy, wind power, and fuel wood.
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ocean currents and winds are results of the uneven distribution of solar radiation over the Earth's surface
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ocean thermal energy, solar heating of the upper layers of the ocean produces temperature gradients that can be harnessed to generate electricity
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Sun also powers the hydrologic cycle, in which ocean water is evaporated, transported over the continents, and precipitated as rain or snow to form rivers
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energy locked in such renewable fuel sources as wood and peat is derived from the Sun by the process of photosynthesis.
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over the entire surface of the Earth at a very low average rate, leakage is much higher in certain locations.
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Nonrenewable resources originate from two processes: (1) photosynthesis, which occurred many millions of years ago, followed by the fossilization of the plant and animal life that resulted, and (2) the formation of the Earth itself.
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A cleaner-burning fuel than oil, natural gas seemed to be in abundant supply at the turn of the 21st century and, with the greatly enlarged network of gas pipelines, was rapidly growing in use.
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nearly total dependence on fossil fuels and hydroelectricity ensures that efforts to solve energy problems by switching to alternative sources will have to overcome a great deal of inertia, both economic and psychological.
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sources as solar power, wind power, and synthetic fuels suffer from the serious drawback that few major installations now exist.
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solar energy reaches the top of the atmosphere in amounts 10,000 times greater than all human production of energy, it reaches the Earth's surface at rates of only about 80 to 250 W/m2, and considerably less on cloudy days.
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arge-scale system based on solar-collector panels will be physically huge, causing problems of maintenance and land use
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Water Pollution - 0 views
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According to the American College Dictionary, pollution is defined as: �to make foul or unclean; dirty.
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Pollution arising from nonpoint sources accounts for a majority of the contaminants in streams and lakes.
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Many causes of pollution including sewage and fertilizers contain nutrients such as nitrates and phosphates. In excess levels, nutrients over stimulate the growth of aquatic plants and algae. Excessive growth of these types of organisms consequently clogs our waterways, use up dissolved oxygen as they decompose, and block light to deeper waters.
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Pollution in the form of organic material enters waterways in many different forms as sewage, as leaves and grass clippings, or as runoff from livestock feedlots and pastures.
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Three last forms of water pollution exist in the forms of petroleum, radioactive substances, and heat.
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These formations, called aquifers, are a vital natural resource with many uses. Nationally, 53% of the population relies on ground water as a source of drinking water. In rural areas this figure is even higher. Eighty one percent of community water is dependent on ground water. Although the 1992 Section 305(b) State Water Quality Reports indicate that, overall, the Nation�s ground water quality is good to excellent, many local areas have experienced significant ground water contamination. Some examples are leaking underground storage tanks and municipal landfills.
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shared by Kate L on 01 Dec 08
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Alternative Fuel Sources - Cheaper And Eco-Friendly - 0 views
ezinearticles.com/?Alternative-Fuel-Sources---Cheaper-And-Eco-Friendly&id=1034941
energy alternative eco-friendly
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The conventional and traditional fuel sources are becoming more and more expensive to extract and their indiscriminate use in the past century has resulted in their depletion.
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natural fuel sources will reach critically low levels and precipitate a crisis much earlier than we think.
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mankind would have perfected and commercialized alternate sources of fuel that will be eco- friendly and affordable too.
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Its contents of 15% gasoline and 85% ethanol mean that it is at least better than using pure gasoline.
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uch alternate fuel sources like E 85 score above gasoline, they still pollute and require a vast amount of corn to be grown
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much better option than consuming petroleum derivatives and polluting more by using small and inefficient combustion motors.
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produced in any manner that suits the needs on a particular location depending on the resources it has