Band 6+: You should spend about 20 minutes on this task. 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 figure illustrates the process of making biodiesel, called ethanol, extracted from harvested plants to be it by vehicles.

Overall, the production process consists of five steps, starting from grown plants as the main raw material to transforming them into manufacturers to complete their production cycle.

In detail, at first, plants and trees from the forests are harvested by tractors and then transferred to a pre-processing step, where they become ready for further steps. In this step, its celluloses are extracted. In the next phase, celluloses are processed in manufacturing, where the sugars are produced. Then, special microbes are added to the sugars. Ultimately, the final good is produced and is used as a fuel in different types of transportation such as cars, lorries, and planes.

Interestingly, the carbon dioxide emissions from exhaust vehicles are released to the atmosphere, and it is absorbed again by the plants. Thus, the process can restart.