Corn ethanol fuel and fuel made from switch grass are two of the most promising biological
fuels or biofuels. Biofuels are fuels that are comprised of
ingredients like plant material. One advantage of corn ethanol biofuel is
that it burns hotter than . Switch grass grows all year long and it is one of
the most biofuels yet developed. Switch grass has a very high
, much better than corn ethanol, but it is not widely used at present.