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 diagram outlines the basic steps of producing

ethanol

, a type of biofuel, and its production phases. In general, 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. At the beginning of the six-stage procedure,

plants

and

trees

absorb carbon dioxide and sunlight from the atmosphere. A process called photosynthesis helps convert these two ingredients into energy, which directly contributes to the growth of these

plants

and

trees

. As they reach maturity, people harvest them using machinery. The harvested products will undergo a pre-processing process, which breaks them down into strands of cellulose by crushing. With the help of chemicals, these cellulose strands are

further

deconstructed into different sugar molecules. After the aforementioned physical and chemical treatment steps, these sugar molecules are

then

biologically processed. Microbes are added to convert the sugars into

ethanol

, which in turn is used as a fuel to power vehicles with combustion engines

such

as cars, trucks, and planes. These vehicles burn up the

ethanol

, releasing carbon dioxide as waste into the atmosphere. The

trees

and

plants

, in turn, consume

this

as their food, and the cycle restarts.