The graph illustrates the processes how ethanol which is a biofuel is produced through various steps.
Overall, the production consists of ten steps where the main processes include harvesting of plants, processing of cellulose and the recycling of carbon dioxide emitted by transports to make more ethanol.
The cycle begins with plants and trees synthesising energy with sunlight and carbon dioxide which is a waste product. Then, the greens are harvested to be pre-processed into a cellulose by a specific machinery.
Followed by the production of cellulose, it is processed to be synthesised into sugars. The sugars are then combined with microbes to produce the end product, ethanol. Lastly, the ethanol made is used by various machines, including small vehicles, large transport cars and airplanes. These form of transportations give off carbon dioxide which is then used up by the plants to start the cycle again.