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In page Compressed natural gas:
"In Spain, CNG is a very new fuel and the refueling network is being developed. In Madrid, the EMT, uses 1915 buses running with CNG.[29] At the beginning of 2015 there were 35 CNG refueling stations in Spain. Several car brands sell brand-new cars running with CNG, including Fiat, Volkswagen, Seat and Skoda among others.[citation needed]
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