Alcohol fuel is like a special kind of gas for vehicles that comes from plants and other natural things. To make it, people take plants and other natural things like sugar or corn, and mix them together in hot water. As the mixture cools, the starch from the plants breaks down and makes alcohol. This alcohol is very flammable, just like regular gas, so it can be used to power engines in cars and boats and even some airplanes. The alcohol also helps to reduce some air pollution, which is good for us and the environment.