1.   This fuel burns more cleanly than other fuels.

2.   Because the fuel never burns, there are none of the polluting combustion products emitted by other gas-powered generators.

3.   Because the fuel burns so cleanly, it may have applications in cars as well as light trucks, said Sara Tatchio, a Ford spokesman.

4.   Besides reducing the reliance on imported oil, which is refined into gasoline, the alternative fuels also generally burn cleaner.

5.   Jet fuel usually burns into vapor but does not readily turn to that form at the relatively low temperatures where the fuel would have been.

6.   Lower-octane fuel burns more rapidly and actually produces more heat energy than premium fuel.

7.   Scientists say this allows them to study combustion in more detail than possible on Earth and to see how different fuels may burn differently.

8.   The rate at which the fuel burns, producing maximum power and efficiency and minimal emissions, is an instrumental aspect of the equation.

9.   These fuels burn cleaner than gasoline, but are far less dense and take up far more space.

10.   This generates high internal temperatures, which cause the fuel to burn spontaneously without the spark plugs and ignition systems of gasoline engines.