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Environmental information systems
Population of the groups of countries in 1997
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- Austria
- Belgium
- Bulgaria
- Cyprus
- Czechia
- Denmark
- Estonia
- Finland
- France
- Germany
- Greece
- Hungary
- Iceland
- Ireland
- Latvia
- Lithuania
- Luxembourg
- Malta
- Netherlands
- Norway
- Poland
- Portugal
- Romania
- Sweden
- Switzerland
a) support the graphic in Core set of Indicators CSI-024 (ver. 2) figure 1 Changes in wastewater treatment in regions of Europe between 1980s and late 1990s