The map below shows the generation cycle of Ethanol and all the steps of that generation. Nowadays Ethanol is one of the staple alternative energy type
First of all, the energy comes from the sun directly to plants and it makes photosynthesis process, after harvesting the greens the material takes pre-processing step, after shredding remained materials call cellulose. Investigation makes sugar and in the next stage after adding the microbes, such as yeasts we get Ethanol.
Secondly, we use Ethanol for air and land transport. Due to it’s cheap and easily accessible than the other energy sources. For example, petroleum. Because, while digging and refining, even during the transportation of the row materials, it negatively effects the environment. In addition to vanish the residues of Ethanol is easier than oil residues.
Finally, the Carbon Dioxide which is spreading from the transport vehicles absorbs from air by trees and the other plants while photosynthesis time. Moreover, ethanol circulation is renewable and kind of vicious circle.