Average annual concentrations of NO2 and PM10 in urban areas
The error bars represent the highest yearly average value measured at one single monitoring station. The dotted line represents the yearly limits set for PM10 (2005) and NO2 (2010).
For references, please go to http://www.eea.europa.eu/data-and-maps/figures/average-annual-concentrations-of-no2-and-pm10-in-urban-areas-1 or scan the QR code.
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