The given illustration demonstrate the production of ethanol using trees.
Overall, it can be seen that ethanol production comprises four steps beginning with harvesting of trees and ending with addition of microbes to processed sugars which results in production of ethanol.
Initially, plants and trees grow and get energy from sunlight and carbon dioxide. Once grown, they are harvested by different machines, after which they are pre-processed and transformed into cellulose.
In the next step, the cellulose are further processed in lab using different chemicals and turned into sugars. Subsequent to turning into sugars, microbes are added to these sugars which consequently turn into ethanol.
Once ethanol is ready, it is used in different vehicles and sources of transportation such as cars, buses, trucks, and airplanes. When these vehicles travel, they produce carbon dioxide which again react with sunlight and helps grow trees, and that’s how this cycle continues to run.