Last week in Germany, retired pulmonary physician Dieter Köhler made waves by publishing a statement, signed by over one hundred other fellow lung doctors, calling into question the science behind air quality standards and suggesting that current EU-wide limits for nitrogen oxides and fine particulate matter are unnecessarily strict. Not coincidentally, this comes at a time when diesel driving bans are being imposed in many German cities because of their inability to meet the EU-wide limit value for nitrogen dioxide (NO2), for which diesel cars are the main source. This has sparked debate on many levels, from the journalistic to the political. In this blog post we specifically address the topic of air quality limit values based on our expertise in the fields of air quality and public health.
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