The Convention on Long-Range Transboundary Air Pollution (CLRTAP) protects the human environment against air pollution and aims to gradually reduce and prevent air pollution, including long-range transboundary air pollution. The European Monitoring and Evaluation Programme (EMEP) implemented the Convention, under the direction of the United Nations Economic Commission for Europe (UNECE). The Convention was signed in 1979.
There are eight further Protocols that extend the Convention including the Protocol to the 1979 CLRTAP on POPs in Aarhus (Denmark) which was agreed on 24 June 1998 and focuses on a list of 16 substances prioritised according to agreed risk criteria. This seeks “to control, reduce or eliminate discharge, emissions and losses of persistent organic pollutants” in Europe and some third countries.