The diagram illustrates the steps involved in producing renewable fuel called ethanol.
Overall, it is a complicated cyclical process that requires natural and industrial processes. It has six stages beginning with plants and trees absorbing sunlight and carbon dioxide for growth and ending with the usage of the final product.
First of all, trees and plants, which obtain energy from the sun and air, are cut down and transported for initial processing. After being extracted, cellulose enters the stage of chemical processing in order to convert it into sugars. Following this, sugars are being mixed with microbes to produce ethanol.
The final ethanol product is used as environmentally friendly fuel in various types of vehicles, such as cars, planes and trucks. These means of transportation release carbon dioxide back into the air. After re-entering the environment, carbon dioxide is then absorbed by plants and trees, and thus sustaining the process.