All stations in EU Member States, with at least 75 % data coverage for at least eight years were included in the analysis. Concentrations per station type are given in μg/m3. In the diagram a geographical bias exists towards central Europe where there is a higher density of stations.
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– to verify whether it isn't poisoning the air in your home or consuming too much energy. Have it replaced once every 15 years – to benefit from the technological advances that render new boilers more energy-efficient.
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