The diagram represents the data about biofuel production, the process of producing ethanol.
Overall, it can be seen that there three cyclical stages of making ethanol. Fistly, the preocess commences with harvestong and gathering plants and trees. Secondly gathered materials are pre-produced and pass through the chemial treatment. And finally, prepared ethanol is used by different kinds of cars, and during their moving it turns into carbon dioxide whereas it is absorbed by plants and trees.
To beging with, growing plants and trees absorb energy (sunlight + carbon dioxide). After that, people harvest and gather those plants and send to the pre-processing.
While pre-processing gathered material is converted to the cellulose. This cellulose is used and processed and turns into some chemical substance, wich forms sugar. To the prepared mixture workers add certain microbes and, ultimately, the ethanol is succesfuly made.
The last stage includes distribution and utilising ethanol. However, when car, planes, and tracks move on, land or take off, ethanol turns into carbon dioxide where process repeats.