The picture demostrates how ethanol, a biofuel, is made. Overall, the ethanol cycle cosists of several stages, beginning from collecting the resources, then a pre-processing phase, before the processing section, and finally its distribution and its return to the production cycle.
First, carbon dioxide is stored in young plants and trees, and with the exposure to sunlight, they grow and then are harvested by workers. In the third stage, plants and trees are cut into little pieces called Cellulose through a machine. In the processing stage, sugars are extracted from Cellulose in laboratories, with Microbes being added to them, making the biofuel called ethanol.
After ethanol has been made, it is distributed for the usage of cars, lorries and aircrafts. Carbon dioxide is released into the air from vehicles’ exhausts, which again will be absorbed by trees and plants, and return to the cycle of ethanol production.