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protokol til konventionen af 1979 om grænseoverskridende forurening over store afstande, angående begrænsning af emissionen af kvælstofoxider og disses transport på tværs af grænserne
environ.	Protocol to the 1979 Convention on Long-range Transboundary Air Pollution, concerning the Control of Emissions of Nitrogen Oxides or their Transboundary Fluxes; Protocol to the 1979 Convention on long-range transboundary air pollution concerning the control of emissions of nitrogen oxides or their transboundary fluxes