Long-range Transboundary Air Pollution
|Term||Long-range Transboundary Air Pollution|
the observed effect that air pollutants can travel several thousand kilometres before deposition and damage occurs (acidification, eutrophication, tropospheric ozone and dispersion of hazardous substances).
European Environment Agency (EEA), website, Glossary 
To address this problem, the UN ECE Convention on Long Range Transboundary Air Pollution was signed in Geneva in 1979 and entered into force in 1983.
The Convention was the first internationally legally binding instrument to deal with problems of air pollution on a broad regional basis. (same source)