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Nitrogen oxide 2010 - Annual limit value for the protection of vegetation

Figure Created 16 Oct 2012 Published 16 Oct 2012 Last modified 10 Dec 2012
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In the air quality directive (2008/EC/50), the EU has set a critical level for nitrogen oxides (NOx) for the protection of vegetation within the zones designated by member states: the NOx annual mean value may not exceed 30 micrograms per cubic metre (µg/m3).

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