PROTOKOL til konventionen af 1979 om graenseoverskridende forurening over store afstande, angaaende begraensning af emissionen af kvaelstofoxider og disses transport paa tvaers af graenserne ###>PROTOCOL to the 1979 Convention on long-range transboundary air pollution concerning the control of emissions of nitrogen oxides or their transboundary fluxes