The process diagram illustrates how
ethanol
, a type of biofuel, is produced from plant materials.
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Overall
, the process consists of several stages, beginning with the growth of plants and ending with the use of Linking Words
ethanol
as fuel. It is a cyclical process, as carbon dioxide released during the final stage is reused in plant growth.
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Firstly
, plants and trees grow using sunlight and carbon dioxide. After they are harvested, the cellulose is extracted and used as the main raw material. Linking Words
This
material is Linking Words
then
processed through several stages to produce sugars.
In the following stage, microbes are added to the sugars in order to ferment them, which leads to the production of Linking Words
ethanol
. Use synonyms
This
Linking Words
ethanol
is Use synonyms
then
used as fuel in vehicles Linking Words
such
as cars and lorries.
Linking Words
Finally
, when Linking Words
ethanol
is burned, carbon dioxide is released into the atmosphere. Use synonyms
This
gas is Linking Words
then
absorbed by plants again, completing the cycle.Linking Words