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umwelt-plakette.de en 2019-11-24

News on environmental zones and air pollution

Retrofitting partly ineffective

Recently, experts have already warned in the manner of prayer mills, but now a study confirms the previous assumption. Thus the positive effect of a hardware retrofit on older diesel engines is low and makes little economic sense. Representatives of the Institute of Automotive Economics emphasize that the level of nitrogen dioxide (NO2) emissions could only be reduced by 3.4 to 3.6 percent by the end of 2023.