How many types of biofuels are there?

Types of fuel used in organism-biofuels,glucose, fossil?

• This is a Biology class question.

• Answer:

  Well, you need to look at your notes to see what was meant, but: Mammals use glucose for cellular energy. That glucose can come from plants that make glucose from CO2 via photosynthesis. Fossil fuels are also used in the production of food, both vegetable and livestock, and in their transport. Some say that 10 units of fossil fuel go into one unit of food energy. for modern American foods. Biofuels can be human food, or fuel for burning like wood, cornstalks, vegetable oil, etc. They are generally inferior for running machinery because they have to capture energy from the sun in real time, rather than drawing from millenia of stored solar energy like fossil fuels. DK