While efforts are under way to develop common strategies to tackle priority issues such as local air pollution, national environmental authorities are often unaware of the state of environmental management in the ever-growing number of municipalities (from 147 in 1995 to 211 at present). The adoption of the Balanced Regional Development Act in 2000 encouraged better co-operation among Regional Development Agencies (RDAs), Councils of Regions, and associations of municipalities and towns. However, oversight by the national government is still insufficient to ensure that environmental requirements are implemented consistently.