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 diagram provides the process of biofuel production, especially focusing on how

ethanol

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is made.

Overall

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, the process begins with the source of energy and ends with carbon dioxide.

According to

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the information shown on the diagram, the energy is made up of sunlight, which plays a vital role in the growth of plants and trees. After harvesting, there is a pre-processing step before the plants are turned into cellulose.

Subsequently

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, the cellulose will be sent to factories to be purified into sugars. With a combination of microbes, the sugars become

ethanol

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.

As a result

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,

ethanol

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will be used in traffic, which leads to carbon dioxide emissions. What should be particularly mentioned is that carbon dioxide creates energy when matched with sunlight and forms the cycle of producing

ethanol

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.

To sum up

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, the diagram is the life cycle of

ethanol

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.