And why you should use it!
The reasons for why you should use bio-ethanol is because it reduces pollution and it is renewable. Bio-ethanol is made from the sugary parts of plants. Currently, cars driving around using harmful fossils fuels. Why use those fuels alone when you can mix them with bio-ethanol and reduce pollution? Also bio-ethanol is the most common bio-fuel in the world so there isn't much financial risk when it comes down to it.
Bio-ethanol isn't as energy efficient as regular car fuels and can't be used as a fuel on its own but doesn't it make up for that by reducing pollution made by regular car fuels?