‘Dual-fuel engine’ means an engine system type approved according to Regulation No 49 or mounted on a vehicle type approved with regards to its emissions according to Regulation No 49 and that is designed to simultaneously operate with diesel fuel and a gaseous fuel, both fuels being metered separately, where the consumed amount of one of the fuels relative to the other one may vary depending on the operation;

For compression-ignition engines and dual-fuel engines operating on diesel fuel

Crude oil is processed into distilled fuels such as petrol and diesel, and residues such as heavy fuel oil and bitumen.

4. Notwithstanding paragraph 2, Member States which introduce a system of road user charges for motor vehicles or articulated vehicle combinations intended exclusively for the carriage of goods by road may apply a reduced rate on gas oil used by such vehicles, that goes below the national level of taxation in force on 1 January 2003, as long as the overall tax burden remains broadly equivalent, provided that the Community minimum levels are observed and that the national level of taxation in force on 1 January 2003 for gas oil used as propellant is at least twice as high as the minimum level of taxation applicable on 1 January 2004.

On a national basis, gasoline and diesel powered vehicles still contribute some 60 per cent of carbon monoxide emissions, 35 per cent of nitrous oxide emissions or smog, 25 per cent of our hydrocarbon emissions, and 20 per cent of carbon dioxide emissions.

Senator Atkins: How are they powered? It is by diesel?