council decis access commun protocol geneva convent long rang transboundari air pollut control emiss nitrogen oxid transboundari flux eec council european commun regard treati establish european econom commun articl thereof regard propos commiss regard opinion european parliament regard opinion econom social committe articl treati activ cooper commun member state intern measur protect environ transboundari natur air pollut interest commun particip intern measur design reduc pollut commun contract parti convent exonom commiss europ unit nation long rang transboundari air pollut geneva convent protocol financ emep cooper programm monitor evalu long rang transmiss air pollut europ articl treati measur commun base principl prevent action environment damag prioriti rectifi sourc principl enshrin air pollut commun legal act reduct emiss nitrogen oxid main sourc motor vehicl larg combust plant principl rectif sourc object nox protocol convent lai gener object stabil total emiss nitrogen oxid applic emiss standard adopt anti pollut measur reserv tighten oblig subsequ negoti technolog entail excess cost set fundament oblig protocol enshrin commun law combat air pollut industri origin principl basic philosophi reduc emiss motor vehicl view damag caus environ light transboundari natur long rang air pollut due emiss nitrogen oxid joint action intern level commun acced protocol reduct emiss nitrogen oxid transboundari flux stabil total emiss nitrogen oxid import step reduc significantli level current emiss nitrogen oxid nitrogen pollut commun decid articl european econom commun acced protocol convent long rang transboundari air pollut control emiss nitrogen oxid transboundari flux text protocol attach decis articl presid council deposit instrument access accord articl protocol brussel council presid hilden oj oj oj oj oj