Låg, Jul (ed.): Chemical climatology and geomedical problemsPreface1. LAgThe International Society of Soil Science established in 1986 the Working Group "Soils and Geomedicine" with Professor R. Dudal, Belgium, as secretary and Professor J. Lg, Norway, as chairman. Before this time the Norwegian Academy of Science and Letters has had considerable activities in geomedicine. The Academy arranged symposia, partly in colloboration with other organizations. The last four arrangements are results of cooperation