Beregning av disdannelse fra Norsk Hydro, Porsgrunn for 1985, 1986 og 1991.

The emission of gaseous compounds as SO2, Cl2, HCl, NH3 and HNO3 in addition to small particles are all of a great importance in the formation of haze in the Grenland region. Model calculations of the haze formation and transport have been performed, using emissions from 1985, 1988, and 1991. A reduction of the emissions of NH3, Cl2 and small particles has caused a reduction of the haze formation, estimated at 61% for a wintersituation, and about 50% in summersituation with haze formation in the sea-breeze front.