Trabalho de Inglês: Combústiveis Alternativos

Comparative sample alternative fuel advantages and disadvantages for vehicles.

With the recent Brazilian efforts so that etanol is changedded into one “commodity” international, the debate was lit on the benefits of the biocombustíveis versus fósseis fuels, to the oil base. The diverse arguments, against and the favor, leave clearly that the solution of the question is far from being easy.

Comparative degree between fuelsThis also is the conclusion of a study that finishes to be published by two Norwegian scientists. Karl Hoyer and Erling Holden had compared the ambient costs of diverse fuels for automobiles, since the gasoline and the oil diesel, until that they are only technological promises, still far from the viabilização, as hydrogen.The result is one “ranking” that it can seem logical to the first sight: the gasoline and diesel, as it would be of if waiting, are in the last ranks. But zebras in the classification has some hidden supreendentes.The comparative degree enters alternative fuels for vehicles was made taking in consideration the energy expenses and the emission of pollutants in the stages of production, industrialization and consumption of some fuels. The use of energy, the emission of gases .causing of the effect greenhouse and the emission of pollutants had been computed local and regionally.Gasoline, diesel and natural gas and alternative fuel sources had been compared, as etanol, methanol, biocombustíveis and hydrogen.Of low to top in the classification, then after the vehicles the gasoline they come the vehicles bicombustible that consume gasoline and natural gas. “Any alternative fuel that we consider is better of what the cars who we use today,” say the researchers.The great champion in terms of ambient profits is the hydrogen, extracted of methanol and generating energy by means of cells the fuel. This is, however, an option still far from the economic viabilização and that, exactly of the point of view strict technician, still possesss problems to be decided.

Vocabulário

Clearly- claramente
Between- entre
Sight- vista
Vehicles- veículos
Consumption- consumo
Effect- efeito
Sources- fontes
Researchers- Investigadores
However- entretanto
Efforts- esforços
Degree- grau

Questões

01-O quê o texto quer com o termo “zebras escondidas”?
02- Qual a colocação da gasolina e o diesel em relação ao “ranking” no texto?
03-O combustível Alternativo é relacionado a alguns problemas que não se soluciona. Quais são eles?
04-Na comparação dos combustíveis qual a opinião dos pesquisadores?
05-Qual se destaca em ganhos ambientais. E de que ele é extraído?

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