Burning gasoline, however, creates air pollution. That's why oil companies are creating newer types of gasoline that are cleaner than the kind we use today. Because of concerns about air pollution, other clean-burning fuels can also be bought at some service stations. Methanol or methyl alcohol is made from natural gas and is a clean- burning fuel. It is used in race cars, such as those in the Indianapolis 500.
Some cars can use methanol and gasoline from the same tank, like the car on the right.
Ethanol is another transportation fuel. It is also called ethyl alcohol and can be produced from corn or other crops. It is a fuel that is being used mainly in corn- growing states like Iowa and Illinois. As a matter of fact, some of the earliest cars ever made were designed to run on ethanol instead of gasoline. Some service stations may sell compressed natural gas for vehicles.