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
Primary and secondary fine particulates are aggregated in this indicator, by using aerosol formation factors for secondary particles as follows: SO 2 0.54; NO x 0.88 and NH 3 0.64 (see ETC/AQ, 2000)
Loading