Katie Fehrenbacher. “10 Things You Should Know About Natural Gas Vehicles”. Earth2Tech – 8). With Gas Prices High, Natural Gas is Cheap, For Now: With the price of gas rising, the demand at the natural gas fuel stations that are out there is way up — like this one in Salt Lake City. That’s because, as Cleantechnica puts it “natural gas now costs about half as much per unit energy as gasoline and has an even greater cost advantage over diesel fuel.” Though natural gas prices are also going up.