particle pollution

Unlike the U.S., most passenger vehicles in Europe run on diesel fuel, not gasoline, and from a public health perspective, diesel emissions can severely exacerbate particle pollution during weather inversions like the one Paris is now experiencing.
Mar 19, 2014   The Atlantic Cities
With pollution levels becoming dangerous in Rome, Italy, the government is taking a hard line on driving. In late November, only cars with even-numbered license plates were allowed to drive in the city, with odd plates the next.
Dec 12, 2011   TheCityFix.com