Motor Vehicles: Exhaust Emissions

Transport written question – answered on 8th May 2014.

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Photo of Karen Lumley Karen Lumley Conservative, Redditch

To ask the Secretary of State for Transport what information later than 2003 his Department has on the relative emissions from motor vehicles powered by road fuel gases.

Photo of Stephen Hammond Stephen Hammond The Parliamentary Under-Secretary of State for Transport

The Department commissioned testing of Liquefied Petroleum Gas (LPG) in 2006 which concluded that the air pollutant emissions performance of LPG vehicles is similar to that of petrol vehicles. The Department is also aware of other studies which showed similar results that engines running on road fuel gases broadly emit less oxides of nitrogen (NOx) and particulate matter (PM) than a comparable diesel engine, while producing CO2 emissions between those of equivalent diesel and petrol engines.

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