. . . . "Compressed Natural Gas" . . . . . . . "CNG vehicle" . . . . "CNG" . . . . "compressed natural gas vehicles" . . . . "natural gas (CNG)" . "natural gas" . . . . . . . "natural-gas" . . "Compressed natural gas (CNG)" . "compressed natural gas" . . . . . . . . . . . . . "Natural Power" . . . . . . . . . . . . . "(CNG)" . . . . "Compressed_natural_gas" . "compressed natural gas (CNG)" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Compressed Natural Gas (CNG)" . . . "gas" . . "Compressed natural gas" . . "''Natural Power''" . . . . "CNG-hybrid buses" . . . . "Bio-CNG" . . "EcoFuel" . . . . . . . . . . "natural gas fuels" . . . . . . . . . . . "Compressed natural gas" . . "''EcoChic''" . . "CNG-powered" . . . . . . . . . . .