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Sea level rise and assessment of the state of the marine environment
A significant sea level rise is one of the major anticipated consequences of climate change. This will cause some low-lying coastal areas to become…
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Inequity in access to clean water and sanitation
The supply of safe drinking water and the provision of sanitation are management issues that raise concerns about inequitable service provision, particularly in developing…
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World’s surface water: evaporation and runoff
Because much of the world’s surface water is far from concentrations of human settlements, not all of it is readily usable. Some facts concerning…
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State of world fisheries and aquaculture
Drawing on research and statistical data since 2000, experts at the University of British Columbia in Vancouver have shown that catches reported by China…
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Biological oxygen demand – BOD: 1976-2008
The availability of oxygen is one of the most important indicators of the condition of a water body, because dissolved oxygen, or DO, (the…
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Increasing price with volume
Rising block tariffs aim to achieve several public policy goals. A low or zero tariff applied to the first block can enhance affordability. For…
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The coming water scarcity in Africa
In a few years from now, almost all sub-Saharan countries will be below the level at which water supply is enough for all. Even…
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Global waterstress and scarcity
Water scarcity occurs when the amount of water withdrawn from lakes, rivers or groundwater is so great that water supplies are no longer adequate…
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Relative demographic weight for each continent
Population percentage increase by continent.
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Water competition between cities and agriculture
It is estimated that water pollution denies close to 1.3 billion people (20% of the global population in 2000) access to clean water supplies.…
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Lake Chad: almost gone
Straddling the borders of Chad, Niger and Cameroon in West Africa, Lake Chad has been a source of freshwater for irrigation projects in each…
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Who will not reach the water and sanitation millennium development goal?
Graphic captioning the time at which Waste water will become suitable levels of consumption.