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 graph below illustrates how to produce a kind of biofuel named

ethanol

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and its relevant carbon cycle. It's obvious that there are 5 stages in the manufacturing process of making

ethanol

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, these mainly contain harvesting and pre-processing the original

plants

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, chemical processing and adding microbes to sugars. At the first

step

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of the process,

plants

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and trees that have already grown are harvested by machines and

then

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poured into the pulverizers for pre-processing. After that, these

plants

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are converted into small pieces of cellulose 3rd stage. In the following

step

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4, the materials that come from the

last

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step

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are sent into the factories for chemical processing, with the output of sugar for

further

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steps. Once the sugar is made, some specific microbes are added to them in the 5th

step

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.

Finally

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, under the effects of relevant chemical reactions,

ethanol

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is produced and used as fuel for both land and air transportation.

In addition

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, these vehicles burn

ethanol

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and emit carbon dioxide, the latter is

then

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converted into energy with the effect of sunlight for

plants

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and trees .