Karen Lumley – 2014 Parliamentary Question to the Department for Transport

The below Parliamentary question was asked by Karen Lumley on 2014-04-30.

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.

Stephen Hammond

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 (NO_x) and particulate matter (PM) than a comparable diesel engine, whilst producing CO₂ emissions between those of equivalent diesel and petrol engines.