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

The diagram outlines the basic steps of producing

ethanol

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, a type of biofuel, and its production phases. In general, the operation involves physical, chemical, and biological treatments to produce

ethanol

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from

trees

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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. At the beginning of the six-stage procedure,

plants

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and

trees

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absorb carbon dioxide and sunlight from the atmosphere. A process called photosynthesis helps convert these two ingredients into energy, which directly contributes to the growth of these

plants

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and

trees

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. As they reach maturity, people harvest them using machinery. The harvested products will undergo a pre-processing process, which breaks them down into strands of cellulose by crushing. With the help of chemicals, these cellulose strands are

further

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deconstructed into different sugar molecules. After the aforementioned physical and chemical treatment steps, these sugar molecules are

then

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biologically processed. Microbes are added to convert the sugars into

ethanol

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, which in turn is used as a fuel to power vehicles with combustion engines

such

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as cars, trucks, and planes. These vehicles burn up the

ethanol

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, releasing carbon dioxide as waste into the atmosphere. The

trees

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and

plants

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, in turn, consume

this

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as their food, and the cycle restarts.