The article discusses the current state and drafts of legal solutions regarding the international aspect of air pollution, in particular the presence of heavy metals in the air. These issues are regulated by conventions approved by EU countries, mainly the Convention on Long Range Transboundary Air Pollution, supplemented with additional protocols, including the Sulphur Protocol (on reduction of SO₂ emissions) and the Protocol on Nitrogen Dioxides which imposes stabilising nitrogen oxide emissions at 1987 levels. The next protocol in the Convention will cover heavy metals. In Poland, heavy metal emissions to the air can be reduced by improved performance of dedusting equipment in heat plants, decreasing the number of stoves in residences, improved quality of stove coal and replacing it with natural gas.