THE next generation of “clean” diesel engines, designed to deliver greater fuel economy and lower emissions of greenhouse gases, will still create more smog-producing pollutants than their petrol-driven counterparts.
The finding emerged from the first comprehensive analysis of the potential environmental impact of diesel engines fitted with nitrogen oxide filters and particle traps, which are designed to cut levels of these pollutants. Engines of this type are due to go on sale in passenger vehicles in the US later this year.
Mark Jacobson, an engineer at Stanford University in California and his colleagues used a survey conducted in 1999 by…
