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| Variable: |
Environment > Water > Dissolved oxygen concentration |
Education > Enrolment ratio > Secondary level |
| Plot Display: |
Logarithmic (base 10) |
Logarithmic (base 10) |
| Definition: |
Dissolved oxygen concentration
Units: Milligrams/Liter
Units: The country values represent averages of the station-level values for the three year time period 1994-96, exceptwhere data were only available for an earlier time period (1988-1993). The number of stations per country varies depending on country size; number of bodies of water; and level of participation in the GEMS monitoring system. The data from "The Wellbeing of Nations" included a smaller subset of stations representing outfalls of major watersheds. An analysis of a sample of countries with numerous stations found that the data for stations in the subset is broadly comparable to the data for all GEMS stations in those countries. |
Net enrolment ratio, secondary level, is the ratio of the number of children of official secondary school age enrolled in school to the number of children of official secondary school age in the population. |
| Source: |
United Nations Environment Programme (UNEP), Global Environmental Monitoring System/Water Quality Monitoring System, with data for an additional 29 countries from Prescott-Allen,R. The Well being of Nations, Washington, DC: Island Press, 2001 |
UNESCO |
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