text: diesel fuels are blamed in france for causing so much polution. a tax policy there makes diesels more populat than gas cars. diesels make up 67 percent of all vehicles in france, while in western europe, 53 percent are diesel. paris usualy has more polution than other big cities in europe. at one point, paris had 147 micograms of particulate matter per cubic meter. brussels had 114 and londan had 79.9.