The diagram process illustrates the produce steps of a biofuel called ethanol.
The process started with plants and trees. With the sunlight and carbon dioxide, plants and trees gain energy and grow up. As the plants were mature enough, farmers will manipulate machines to harvest. After packing them, it will be sent to a machine for pre-processing, dividing them into small piceses as big as cells to cellulose. After that, a chemistry experiment is settled for further process. Sugar, as the content of the original material, will be sperated from the liquid. It plays an essential role in the next step for ethanol process. The microbed will be add in to the suger and sugar was considerd as its nutrition. After biological reflection, the ethanol were made, and will be the fuel of viechels and airplanes.
Carbon dioxide was emissioned with the gas produced by viechels into atmosphere, and finally those carbon dioxide was absorbed by trees again as a cycle.
