21.   Gas is slower-burning, resulting in reduced wear on principal engine components and reduced running costs.

22.   Firstly, gas is lighter than air and leakages dissipate in the atmosphere rather than forming a local hazard.

23.   I reckon the gas is cool.

24.   And though the gas is hard to ignite when it is cool, heating it can cause premature ignition and backfiring.

25.   As to why gas is more expensive in Northern California than anywhere else, Shiller said he could only guess.

26.   At the tips of these columns, six trillion miles high, gases are so dense they collapse under their own weight, giving birth to more new stars.

27.   Automakers dispute this, however, saying that the naturally occurring gas cannot be specifically pinned on car emissions.

28.   Because LP gas is less dense than gasoline, a car must use more of the fuel to travel an equal distance.

29.   Before you start shouting, we know that comparing gas to diesel is like comparing Dale Evans to Dale Earnhardt.

30.   A couple of the less-friendly NOx gases include nitrogen dioxide, a stinky reddish brown gas considered to be a severe hemotoxin.