Ethanol is a fuel that can be made from corn. one of the benefits of using a biomass fuel like ethanol is
a. it can only be used to power certain types of machines
b. it is a nonrenewable resource
c. it is a renewable resource
d. it releases pollutants when it is harnessed
more than 98% of u.s. gasoline contains ethanol, typically e10 (10% ethanol, 90% gasoline), to oxygenate the fuel, which reduces air pollution.
the last one is the correct answer
the energy transferred is exponentially decreased each time it is raised a level.