UN/ECE International co-operative programme on effects on materials, including historic and cultural monuments. Evironmental data report September 1989 to August 1990. Report no. 9.

The UN/ECE International Co-operative Programme on Effects on Materials, including Historic and Cultural Monuments have an extensive programme on material exposure in well defined environment. This report includes the environmental data from the third exposure year of temperature, relative humidity, time of wetness, sunshine hours, SO2, NO2 and O3 concentrations and precipitation amount and quality. A statistical treatment of the data has been carried out.