LPG
LPG, also sometimes know as autogas produces fewer emissions than petrol and diesel but fuel consumption is worse. It has been popular in the past due to its cheaper cost; it retails for roughly around half the price of petrol and diesel. However there are not many cars that are LPG ready, a conversion costing around £2000 is necessary for most vehicles. It has a simple chemical make-up meaning LPG produces significantly less carbon monoxide, hydrocarbons and oxides of nitrogen emissions as well as a smaller percentage of carbon dioxide emissions than petrol. LPG also emits 90 per cent less particulates, in weight, than diesel engines. LPG is also a natural by-product of gas production meaning that there is a plentiful supply. However there are limited numbers of service stations from which you can refill. From an environmental view point, LPG will quickly evaporate in the event of a fuel spill meaning that unlike petrol and diesel, there little risk of ground or water contamination. It also offers a quieter ride, noise levels are around 50 per cent quieter than diesel engines. There are other fuels that can be used in an alternative combustion engine to provide a substitute to conventional petrol and diesel such as compressed natural gas (CNG), Coal-to-Liquid (CTL), Biomass-to-Liquid (BTL) and a whole host of biofuel related sources such as rapeseed or palm oil.
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