... Preliminary evaluation of forest ecosystems' state near the smelter was made, the monitoring methodology for polluted areas was developed, and critical loads of acid deposition were assessed (see also soil.msu.ru/projects/acidification/ ). ... The new built up database on forest ecosystem data for permanent monitoring plots was used for analysis of soil chemical state in forest ecosystems subjected to airborne pollution in the fragile boreal environment in the Norwegian-Russian border area. ...