council resolut june revis list categori pollut studi part programm action european commun environ council european commun regard draft resolut submit commiss risk human health environ pollut object assess assess order defin limit pollut level environ determin qualiti standard appli product gap pollut effect studi research undertaken field pollut list categori programm action european commun environ studi programm definit list categori pollut drawn adopt resolut revis list categori pollut studi commiss context programm action european commun environ order reduc pollut nuisanc gt pic file quot quot gt oj commiss consult nation expert examin substanc asterisk order identifi compound deriv closer studi devot ammonia studi concern long term effect