All official European Union website addresses are in the europa.eu domain.
See all EU institutions and bodies
An official website of the European Union | How do you know?
Environmental information systems
The change in particulate matter includes emissions of both primary and secondary particulate-forming pollutants (the fraction of sulphur dioxide SO2, nitrogen oxides NOX and ammonia NH3 which, as a result of photo-chemical reactions in the atmosphere, transform into particulate matter with a diameter of 10 ¼m or less)
Loading