Exhaust gas that they produce smaller quantities of toxic pollutants (e.g. oxides of nitrogen) than petrol and diesel engines of the same power. They produce larger quantities of carbon dioxide but less carbon monoxide due to more efficient combustion. Researchers from the University of California, Los Angeles School of Public Health say preliminary results of their statistical study of children listed in the California Cancer Registry born between 1998 and 2007 found that traffic pollution may be associated with a 5% to 15% increase in the likelihood of some cancers. A World Health Organization study found that diesel fumes cause an increase
What Car? carry listings from other sources, dropping the 'Approved Used' branding. In October 2016, "What Car?" launched a new online car buying service called 'New Car Buyer Marketplace'. Built into the existing whatcar.com website, it lets readers buy discounted cars from dealers in their area who have signed up to a "What Car?" code of content. Users can add options, change trim and alter finance preferences to get a ‘live' price which dealers are committed to. "What Car?"'s 'Target Price' – a long-established recommendation of the most the magazine's mystery shoppers think someone should pay for a particular model – is