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.

The diagram illustrates the full cycle of the biofuel called

ethanol

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from production to consumption. The manufacture of

ethanol

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consists of five steps, involving both natural and artificial processes.

This

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biofuel can be deployed to multiple vehicles, and the ultimate waste is always carbon dioxide which will be emitted into the atmosphere. The production of

ethanol

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begins with harvesting matured plants and trees which absorb the sunlight and ambient carbon dioxide to support their growth. After harvesting, the raw materials will go through the first level of processing which yields cellulose. The first intermediate product cellulose is

then

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transformed into the second intermediate product, namely the sugars, after a series of chemical processes. The final step is to add microbes into sugars and utilize their natural ability to produce

ethanol

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from sugars. The

ethanol

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can be used as fuel for cars, trucks and even aeroplanes. The burning of

ethanol

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will only produce carbon dioxide which immediately enters the next cycle of the production of

ethanol

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itself.