Precipitation chemistry monitoring begins in SwedenJan 1, 1949Labels: Sweden, Precipitation monitoringAmbio
European-scale monitoring foundations expand in early 1970sJan 1, 1972Labels: European monitoring, EMEPACP
OECD adopts guiding principles for environmental policyMay 26, 1972Labels: OECD, Environmental policyOECD
Helsinki Protocol sets 30% sulphur reduction goalJul 8, 1985Labels: Helsinki Protocol, Sulphur reductionEEAUNECE
Sofia Protocol addresses nitrogen oxides emissionsOct 31, 1988Labels: Sofia Protocol, Nitrogen oxidesUNECE
ICP Integrated Monitoring (ICP IM) is establishedJan 1, 1989Labels: ICP IM, Ecosystem monitoringTh nen