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Pollution

Table of contents
Toward a world of thirst?ForewordExecutive summary Water and population

1. State of the world’s water

2. Freshwater resources

3. Coastal and marine water

4. Water and climate change

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In this chapter

Biological oxygen demand - BOD: 1976-2008	Freshwater alkalinity: 1976-2008	Nitrate levels: concentrations at river mouths
Dissolved phosphate levels: concentrations at river mouths

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