The diagram below shows how a biofuel called ethanol is produced

The diagram illustrates the cyclical process of producing

ethanol

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, a biofuel, from plant materials.

Overall

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,there are about 9 main phrases in biofuel production, starting with growing

plants

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and trees and finishing with supplying

ethanol

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for transport and

carbon

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dioxide

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.

To begin

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with,

plants

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grow by absorbing sunlight and

carbon

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dioxide

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. Once they mature, they are harvested and sent to a pre-processing machine, which breaks them into smaller parts, mainly cellulose.

Subsequently

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,

this

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cellulose is transported to a lab, where it is chemically processed into sugars.

Following

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this

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, microbes are added to ferment the sugars, which

produces

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produce

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ethanol

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. After that, the

ethanol

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is used as fuel in various transport modes

such

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as cars and

airplanes

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aeroplanes

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. During combustion,

carbon

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dioxide

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is released into the air.

This

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, in turn, is reabsorbed by

plants

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,

thus

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completing the cycle. In conclusion,

ethanol

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production from

plants

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is a sustainable process, as it continuously cycles

carbon

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dioxide

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between the environment and vegetation.