International aggerments on atmospheric pollution By toritorichopper 1979 Convention on Long-Range Transboundary Air Pollution 1991 US Canada Air Quality Agreement 2015 European Union Directives for Air Quality 2017 The Canada-US Border Air Quality Strategy 2018 ASEAN Agreement on Transboundary Haze Pollution 2020 Agreement of Reducing Smog and Harmful Chemicals Perdition 2021 Convenient for Reduced CO2 and SO2 Perdition 2022 India-China Agreement for Air quality Perdition