- Áú¹®³»¿ë - I'd like to send this parcel to cost of test x180 ignite There are now only about 66,000 light-duty natural gas-powered cars on U.S. roads, according to the Department of Energy, which tracks vehicles fired by alternative fuels. That is a tiny fraction of the nearly 200 million light-duty vehicles on U.S. roads, according to the Transportation Department.
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