The diagram depicts the production of the biofuel ethanol. Overall, the process is a mixture of natural and man-made and it consists of 3 main stages. Initially, plants are harvested and they will be processed, eventually creating ethanol. The ethanol is distributed to vehicles, which produces carbon dioxide to restart the process.
To start with, sunlight and energy is absorbed by plants, making them grow and be ready for harvest. After this, the natural resources are harvested, entering a pre-process stage. This breaks down the materials, converting it into cellulose.
Furthermore, the cellulose is processed and fabricated into sugars. Subsequently, microbes are added, which produces ethanol. Additionally, the finished product is used by cars, trucks, and airplanes. These vehicles produce CO2, which is used as energy for plants, repeating the cyclical process.
