: The National Air Pollution Monitoring Network (NABEL) and cantonal and urban monitoring networks provide information on current concentrations of the principal pollutants.
International air pollution control
Since air pollutants do not recognise national borders, many air quality problems cannot be resolved by one country on its own. It is only possible to reduce air pollution if neighbouring countries also take appropriate measures. In view of this, Switzerland is actively involved in a variety of international organisations that focus on limiting air pollution in Europe.
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