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

The diagram below provides how a biofuel called

ethanol

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is produced.

Overall

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, it is a cyclic process which contains 8 steps, starting with gaining energy from the sun and finishing with emitting

of

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apply

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carbon dioxide into the air. First of all, for growing

of

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plants and trees, they gain energy from sunlight and carbon dioxide to themselves. After growing to normal size, people will harvest them with their combines and

then

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, collected plants will be pre-processed by machines. In the next part of the process,

produced

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the produced

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cellulose will be taken into

laboratory

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the laboratory

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.

Then

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, scientists will make sugars and for

final

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the final

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step of making

ethanol

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microbes will be added

into

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to

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sugars

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the sugars

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.

That is

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how

ethanol

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is produced

Furthermore

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, as a main part of the biofuel,

ethanol

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is used for

loots

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lots

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of transports

such

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as planes, trucks and cars.

Then

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,

while

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driving these vehicles, carbon dioxide is reproduced and

this

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cyclic process

start

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starts

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again.