The diagram below shows how a biofuel called ethanol is produced.

The illustration below depicts how a biofuel known as ethanol is made.

Overall

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, we can separate the process into four different stages. First of all, the raw material,

then

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the processing, followed by the final ethanol and

lastly

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, how it comes back to nature. In the first two stages, plants and trees are harvested and transported to a pre-processing stage, where

this

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material is converted into cellulose. After that, it is moved to a laboratory where cellulose is processed to be transformed into another state.

This

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process is at the same time both the primary and scientific sectors. Later, the cellulose is transformed into sugars after a scientific procedure, and after that, microbes are added to

finally

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get the ethanol. It is introduced into vehicles

such

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as cars, planes or trucks. These machines release a gas called Carbon Dioxide , which is essential for the growth of trees and plants, and

thus

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, the ethanol-making cycle can start again.