Fuel type refers to the specific kind of material used to produce energy, typically for powering vehicles, heating, or generating electricity. Common fuel types include gasoline, diesel, natural gas, coal, and renewable sources like solar and wind. Each fuel type has different properties, costs, and environmental impacts. The choice of fuel type can affect efficiency and emissions. For example, electric vehicles use electricity as a fuel type, which can be generated from various sources, including fossil fuels and renewables. Understanding fuel types helps consumers make informed decisions about energy use and environmental sustainability.