The diagram below shows how a biofuel called ethanol is produced. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

A glance at the figure provided illustrates four primary stages involved in the process of manufacturing a green fuel named

ethanol

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. Apparent is the fact that the main sources used for

ethanol

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manufacturing are

plants

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and trees. Having received enough energy from sunlight and emitted carbon dioxide provides the opportunity for greeneries to grow. After growing up adequately, they are

then

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harvested using special machinery. In order to convert the harvested

plants

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and trees to cellulose, they are crushed under the second stage named pre-processing. Undergoing a chemical process, the cellulose strains are converted into sugar molecules.

Finally

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, adding microbes to sugars causes a biological reaction and results in transforming sugar into

ethanol

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, a fuel used in the aerial and terrestrial transportation industry for riding cars, trucks and planes. More Interestingly, the emitted carbon dioxide is again absorbed by

plants

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and the cycle continues to be repeated. In summary,the operation involves physical, chemical, and biological treatments to produce

ethanol

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from trees and

plants

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.

Ethanol

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is

then

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used as an alternative to fossil fuels to reduce pollution.