The diagram below shows the process of producing biofuel : how ethanol is made.

The diagram illustrates information about the circular

process

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of producing biofuel specifically ethanol. Looking from an

overall

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perspective, it is obvious that a five-

step

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process

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which

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apply

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starts from plants and

then

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the produced biofuel is burnt in vehicles. It can be assumed that plants and trees, as an initial

step

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, are harvested and collected by farmers and in the next

step

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, the products are sent to a pre-processing

step

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to chop and smash. The main

products

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product

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of the previous stage

are

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is

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cellulose, which is the raw material

of

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for

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synthesizing ethanol,

transforms

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transformed

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into sugars through an experimental

process

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. The next

step

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includes

biological

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a biological

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process

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through adding microorganisms in order to synthesize ethanol. The synthesized fuel is utilized as

clean

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a clean

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fuel in

transports

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transport

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.

Subsequently

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, greenhouse gases particularly carbon dioxide are produced in combustion

engine

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engines

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and

then

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spread in the atmosphere.

Finally

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, greenery exposed to sunlight adsorbs gases as

an

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apply

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energy to grow and

then

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harvested so on.