The diagram below shows how a biofuel called ethanol is produced. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

A glance at the figure provided illustrates four primary stages involved in the process of manufacturing a green fuel named

ethanol

. Apparent is the fact that the main sources used for

ethanol

manufacturing are

plants

and trees. Having received enough energy from sunlight and emitted carbon dioxide provides the opportunity for greeneries to grow. After growing up adequately, they are

then

harvested using special machinery. In order to convert the harvested

plants

and trees to cellulose, they are crushed under the second stage named pre-processing. Undergoing a chemical process, the cellulose strains are converted into sugar molecules.

Finally

, adding microbes to sugars causes a biological reaction and results in transforming sugar into

ethanol

, a fuel used in the aerial and terrestrial transportation industry for riding cars, trucks and planes. More Interestingly, the emitted carbon dioxide is again absorbed by

plants

and the cycle continues to be repeated. In summary,the operation involves physical, chemical, and biological treatments to produce

ethanol

from trees and

plants

.

Ethanol

is

then

used as an alternative to fossil fuels to reduce pollution.