The only problem with natural gas is that you are limited to the
distance traveled, per fill-up.
The fuel tank would have to be humongous to hold enough to go the
distances we are traveling now with gasoline.
It believe that alcohol will be the answer.
In southern Ill. there are 4 alcohol refineries being constructed as we
speak.
There is so much wasted grain, that the government lets rot every year
(100's of  millions of bushels) by subsidising the farmers, that a
alcohol /gasoline mix I believe will be the fuel of the future.
I would be so easy to do, and I just can't see, the whole country
converting to LP, or natural gas.
Too expensive,
Too complicated.

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Terry
74 Westy (Clementine)
85 GL