The provided diagram demonstrates the sequencing stages involved in the production of ethanol, a type of biofuel, from the cultivation of specific plants to the final product of the manufacturing process.
Overall, the multi-step process includes physical, chemical, and biological procedures to make ethanol from trees and plants. After passing all steps of production, ethanol is consumed and then emits carbon dioxide, which can be used as a precursor for the next cycle of manufacture.
At the beginning of the six-stage process, plants and trees absorb carbon dioxide and sunlight from the atmosphere for photosynthesis. This procedure directly contributes to the growth of these plants and trees. When reaching maturity, these plants are harvested by using machinery. The harvested products then undergo a pre-processing process, which breaks them down into small strands of cellulose by grinding. With the chemicals, these cellulose strands are restructured into the molecules of sugar.
After the physical and chemical steps, these sugar molecules are then biologically processed. Microbes are added to convert sugar into ethanol substance, which is used as a fuel for various types of vehicles such as cars, trucks, and planes. Such vehicles burn up this substance and release carbon dioxide as waste into the atmosphere. The trees and plants utilize carbon dioxide again as their food and the cycle restarts.