: 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. More information on the
topic Air is available in German, French and Italian