The "fuel cell cars" currently being advertised are being touted as "having no emissions except water." In a limited sense that is‚ in fact‚ true. However‚ if the entire fuel cycle for the car is considered it most certainly is not. The fuel used by the fuel cell is hydrogen‚ very pure hydrogen. Combined with oxygen from the ambient air‚ the fuel cell produces electricity that powers an electric motor and other devices in the vehicle--just like the battery-driven electric vehicles already on the
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Keep the grades Without a grading system‚ could anyone expect students to do better in college? If we stop using the grading system for college students then students will lose motivation to help them in their studies. Additionally‚ keeping the grading system will help students show where their weakness in a subject is at. Lastly‚ the system provides a way to measure students ranking in their academic achievements. Colleges should keep the grading system to motivate students to do well in school
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ethanol or biodiesel. The next big thing in automotive fuel may very well be hydrogen. Automakers rapidly are closing in on making hydrogen fuel cell vehicles an everyday fact of life‚ with several test models set to debut over the next few years. Hydrogen fuel cells to power vehicles are desirable‚ experts say‚ because hydrogen is a renewable fuel that can be used to create electricity to run cars. A chemical reaction between oxygen and hydrogen produces the electric power‚ and when pure hydrogen is used
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EFFECT OF FOSSIL FUELS ON THE ENVIRONMENT Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms. The age of the organisms and their resulting fossil fuels is typically millions of years‚ and sometimes exceeds 650 million years.[4] Fossil fuels contain high percentages of carbon and include coal‚petroleum‚ and natural gas.[5] They range from volatile materials with lowcarbon:hydrogen ratios like methane‚ to liquid petroleum to nonvolatile materials
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INTRODUCTION According to Wikipedia‚ fuel is any material that stores energy that can later be extracted to perform mechanical work in a controlled manner. A fuel contains energy‚ mostly heat‚ which can be released and then manipulated. Most fuels used by humans undergo combustion‚ a redox reaction in which a combustible substance releases energy after it ignites and reacts with the oxygen in the air. Other processes used to convert fuel into energy include various other exothermic chemical
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EARTH’S DEPENDENCE ON FOSSIL FUELS CINDY MOYER AXIA COLLEGE UNIVERSITY OF PHOENIX In today’s world‚ more and more people are becoming aware of the problems that are caused by the use of fossil fuel and are looking for earth-friendly and economical energy to use as a source to heat and cool their homes‚ drive their vehicles‚ use electric or whatever they do to use energy. Scientists are busy thinking up a variety of ways of producing renewable energy to replace the use of non-renewable
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Describe and explain how the use of Fossil fuels may affect the environment and discuss measures‚ which could be taken to reduce the harmful consequences Fossil fuels include gasoline‚ oil‚ coal‚ or natural gas. Whenever we burn them‚ more pollutant gases are emitted into the atmosphere. They are burned to run cars and trucks‚ heat homes and business and power factories and are responsible for about 98% of U.S carbon dioxide emissions‚ 24% of methane emissions and 18% of nitrous oxide emissions.
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under the hood than a gasoline-powered car. For one thing‚ there is a lot less tubing. For another‚ if you look underneath the hood of an electric car‚ one of the first things you will probably notice is the controller‚ which takes energy from the battery and distributes it to the motor in controlled packets. And that’s pretty much it in a nutshell. Instead of a gas tank‚ the electric car keeps its fuel in a battery and relies on the controller‚ not the distributor‚ to get that fuel to the motor and
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COMPARITIVE LIFE CYCLE COSTING FOR OF A GASOLINE AND A HYBRID CAR Digvesh khot ‚ Narendran Neelagandan ABSTRACT The depletion of the fossil fuels is emerging as a concern for the whole world. The major sources for the consumption of this fossil fuel are our vehicles that use much of the oil for their operation. The need has been felt to devise the alternative fuel for our vehicles which should be the sustainable option so that it does not contribute to the environmental impacts rigorously
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Impact Of High Fuel Prices Impact of High Fuel Costs The rise in the cost of fuel has had an impact in many areas of our economy. Higher food prices‚ costs of heating‚ and transportation have had the largest affect on the average American. This change has forced us to make choices in order to maintain our current quality of life and has sparked a philosophical debate as to how we arrived here and how we should attack this problem in the short term and in the future. Do we maintain our consumption
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