This diagram is showing a type of biofuel production-how ethanol is made. The process involves a lot of steps.
Firstly, plants and trees grow using sunlight and carbon dioxide. After they grow enough, they are harvested by machines. Then harvested plants are pre-processed to break them down into smaller parts, which releases some carbon dioxide.
Next, the cellulose we got from plants and trees is extracted and taken to a processing facility. After this step, sugars and microbes are added we are getting ethanol.
Finally, the ethanol is using for cars, trucks, and airplanes. When ethanol is used, it produces carbon dioxide, which goes back into the atmosphere and helps plants grow again, completing the cycle.
In conclusion, the production of ethanol is a continuous process. Although it still produces carbon dioxide, the amount is balanced by the plants that absorb it during growth.
