Environmental Project, 447, 1999

Impact of Regulations of Traffic Emissions on PAH Level in the Air


Measurements made in the period 1992-94 (Miljørprojekt 285,1995) indicated, that the levels of PAH and mutagens was reduced during period. It was estimated that explanations could be the increased use of catalytic converters and the introduction of an improved diesel fuel. The measurements in this project confirm, that a significant reduction of PAH and mutagens took place during the period 1992-1996. The reduction of the PAH-concentration has been estimated to about 35 %. It is concluded that 2/3 of the reduction is due to the use of the improved diesel quality and 1/3 to the increased use of catalytic converters.

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