The plans below show a harbour in 2000 and how it looks today. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram depicts the production of a biofuel namely

ethanol

, which involves three important stages including the pre-processing, processing, and post-processing stage. In the pre-processing stage, plants and trees are harvested in order to obtain the

ource

Correct your spelling

source

of basic materials.

Next,

they will enter a machine to ensure that these items will be transformed into cellulose. After that, in the processing phase, they are converted into sugars through the process of the chemical reaction. Following that, in the post-processing step, some microbes are added to the previous chemical which makes it become the final product called

ethanol

. Later, it can be used to run various modes of transportation which emit carbon dioxide into the air that becomes the source of energy that plants and trees use to grow.

Lastly

,

this

process will repeat continuously to keep producing

ethanol

.

To conclude

, the process of

ethanol

production is a complex one

that is

capital intensive.