IMPACT OF AIR-POLLUTANTS EMITTED FROM THE OIL-SHALE INDUSTRY ON CONIFERS

Investigations on the emission quantities from chemical and power plan ts located in the town of Kohtla-Jarve, and the results of atmospheric air quality calculations as well as monitoring data demonstrate that the role of acid deposition precursors among different air pollutants increased essentially during the period 1988-1995. Precipitation and s oil analyses and morphometrical characteristics of Norway spruce and S cots pine on open land and in forest sites indicated serious changes i n the morphology of conifers. A drastic aggravation of their state und er the influence of the multicomponential air pollution complex was fi xed in northern or northeastern areas at a distance of 2-3 km (Saka re gion) from Kohtla-Jarve.