This is a starter. Honda's home compressor system is the realloy attractive part of Honda's package. A hybrid natural gas system only needs the second fuel to give it the needed range to make it really attractive. Remember every truck stop keeps a propane tank to fuel up the refrigerated tractor trailers. Propane is slower to get than gasoline but it is there to get. I use a diesel motorhome with a propane generator. Flying J has both. Interestingly, I hadn't used propane as a motor fuel in a long time. About a year out I got a bad conscience and changed the oil in the propane generator engine. The oil was clean and clear. I had forgotten how really wonderful gaseous fuels are. Really, really, really lets try to do a dual fuel natural gas, propane automobile. Despite a lot of loose talk the automobile is not the worst culprit in CO2 production. The automobile supplies about 6 to 7 percent of the CO2. Electrical coal generation is the worst, largest source. So your wind power suggestion is a good idea. Natural gas peaker power backing the wind is not a bad idea. The biggest baddest problem is the matter of energy storage. A gallon of gasoline is relatively light and energy dense. That is why it has been popular. There is no inexpensive, energy dense form of energy storage. Does anybody anywhere have any brilliant ideas on this? If this problem can be solved, wind power can replace carbon. Solar can be stored. Hydroelectric could be stored. Light weight energy dense storage stands in the way of the electric automobile. At some point we are going to want to divert ALL carbon sources to food production. That is the only way we will feed the super giant world population. Engineering foods from coal, oil, and natural gas is going to really take some talent. I get the distinct impression that nobody anywhere is listening.