Band 6+: 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. You should write at least 150 words.

This illustration reveals the steps of making ethanol during the production of Biofuel.

Overall, grown trees are harvested and transported to the factories, where harvests undergone with various chemical changes before being used as fuel for locomotives. Finally, exhausted carbon dioxide from vehicles are released to the atmosphere, which is again used as the energy for plants to grow.

Harvested trees are transported for processing by tractors. Consequently, pre-processing of bio parts from trees leads to cellulose conversion before being processed with chemicals to form sugars of the cellulose. Vital microbes are then added to the proceedings to extract ethanol.

With regards to ethanol, it is essential liquid for transportation, where cars, trucks and airplanes used it as the fuel. Furthermore, ethanol combustion in engines output carbon dioxide to the air, which is again used as energy for plant’s growth with addition of sunlight. Moreover, this process never ends and kept in a loop in processing.