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 process illustrates the stages involved in the production of ethanol.

Overall

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, the procedure is cyclical in nature, beginning with logging grown trees and plants and returning to the same step to repeat the cycle. In the first stages, plants and trees are allowed to grow before being felled by machines. Followingly, raw material is

then

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transported by tractors to a factory where the wood undergoes a pre-processing stage. Once the cellulose is extracted from the wood, it is

then

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processed in the lab to obtain sugars. After that step, microbes have to be added to sugar molecules, making ethanol as a final product.

Subsequently

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, ethanol is utilised as a form of biofuel in a range of vehicles, including light automobiles, trucks and planes, all of which, in turn, emit carbon dioxide into the atmosphere.

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, CO2 spreads to the air

,

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apply

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before becoming a source of energy for plants alongside sunlight. The whole process starts again at

this

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point.