WRITING TASK 1
You should spend 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 making comparisons where relevant.
Write at least 150 words.
The image displays the process by which ethanol, a type of biofuel, is made.
Overall, it can be seen that it is a 10-stage, man-made, cyclical process. It begins with plants and trees absorbing energy from the atmosphere to grow and culminates in the release of carbon dioxide in the atmosphere from different vehicles that run on ethanol.
The process begins when plants and trees absorb sunlight and carbon dioxide from the environment as their energy source to grow, and after they are fully grown, some of them are harvested mechanically. Once harvested, they are sent for the pre-processing process, where they are shredded into cellulose in a machine.
Following that, the cellulose undergoes processing, where it is treated chemically in labs to extract sugar before adding microbes, and as a result, ethanol, a renewable source of energy, is obtained. This fuel, made from biomass, is used to operate cars, trucks, and planes. When these vehicles are used, they burn ethanol and expel carbon dioxide, which gets added to the atmosphere. This carbon dioxide is then used again by plants and trees as a source of their energy, and the cycle continues.