International air policy has shown good results in Europe: in the past 35 years the air has become cleaner. Nevertheless air pollution is still an important cause of premature death. Cleaner vehicles and industrial installations were the main reason for emission reductions. The contribution from agricultural sources became more important. These are the some findings of the report Towards Cleaner Air developed under the UNECE Convention on Long-range Transboundary Air Pollution (Air Convention), launched in Brussels today.