Convention on Long-Range Transboundary Air Pollution (CLRTAP)

CLRTAP is an international convention on controlling the Air Pollution. The convention came into being in March 1983 and has 51 parties.

Since its adoption in 1979, CLRTAP has addressed some of the major environmental problems of the UNECE region (United Nations Economic Commission for Europe). This has been achieved through a process of scientific collaboration and policy negotiation. In this way, since its entry into force in 1983, the Convention has been extended by eight protocols which identify specific obligations or measures to be taken by Parties. The major protocols are Sulphur Emissions Reduction Protocol and Gothenburg protocol.

Refer : http://www.unece.org/env/lrtap/