Electricity generation comes from many energy sources, including fossil fuels such as natural gas and coal, nuclear energy, and a variety of renewable sources such as wind, solar, hydroelectric, and biomass. For the transportation sector, however, energy comes primarily from crude oil.
If you spend time driving on the interstate highway system in the US, you may be surprised to see the rapid development of wind energy. This is especially true in the Great Plains where there is a seemingly endless array of wind turbines decorating the horizon. And, north of Los Angeles, the Tehachapi Mountain Range is home to almost 5,000 wind turbines.