The problem with Natural Gas is filling it. The only way to get any range is to have a liquid gas. This means a filling station of some sort. They don't exist at this stage except at some truck depots that may be using it. For CNG (compressed natural gas) you can buy a home filling station that uses the gas going to your house. However, the filling equipment is expensive as because it is only compressed and not liquified, you don't fit as much in and therefore the range is lousy.
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