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? best models to buy, and this has since been an annual – and eagerly awaited – feature. In 1996, the website www.whatcar.com was launched. More recently, "What Car?" launched another print edition in 2006, published in India every two months, which subsequently became a monthly publication. "What Car?" was featured in the movie "Early Man" (2018), though titled "What Chariot?". Every year in January, "What Car?" hosts an awards ceremony, where it names the best cars in each sector of the car market, and an overall Car of the Year, with the Renault 20 receiving the inaugural award in 1978.