most used energy source in oklahoma
search and development of alternative energy sources. It is now possible to drive a vehicle powered by nearly a dozen different fuel or fuel combination options. Natural Gas Natural gas is the most common alter-native vehicle fuel used in Oklahoma. Even though natural gas is a fossil fuel and not renewable, it does fulfill the major criteria of alternative fuels. It is produced domestically, even locally in Oklahoma. Its use ensures energy security in addition to a degree of eco-nomical security for Oklahoma.