Distribution of stations by thresholds of SO2 99.18 percentile concentrations for the year 2011. The chart is based on the 99.18 percentile of the SO2 daily concentrations, corresponding to the 4th highest SO2 concentration when data availability is 100% over the year.
On very hot days use public transport rather than your car.
Car exhaust emissions react with sunlight and heat to cause polluting gases such as tropospheric ozone. This is the main ingredient of poor air quality and photo-chemical smog, which can cause breathing difficulties. To find out the level of ozone pollution across Europe, go to EEA's Live Ozone Map.
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