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.

The graph below illustrates how to produce a kind of biofuel named

ethanol

and its relevant carbon cycle. It's obvious that there are 5 stages in the manufacturing process of making

ethanol

, these mainly contain harvesting and pre-processing the original

plants

, chemical processing and adding microbes to sugars. At the first

step

of the process,

plants

and trees that have already grown are harvested by machines and

then

poured into the pulverizers for pre-processing. After that, these

plants

are converted into small pieces of cellulose 3rd stage. In the following

step

4, the materials that come from the

last

step

are sent into the factories for chemical processing, with the output of sugar for

further

steps. Once the sugar is made, some specific microbes are added to them in the 5th

step

.

Finally

, under the effects of relevant chemical reactions,

ethanol

is produced and used as fuel for both land and air transportation.

In addition

, these vehicles burn

ethanol

and emit carbon dioxide, the latter is

then

converted into energy with the effect of sunlight for

plants

and trees .