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Freshwater resources: volume by continent Freshwater resources: volume by continent
Glaciers and ice caps cover about 10% of the world’s landmass. These are concentrated in Greenland and Antarctica and contain 70% of the world’s freshwater. Unfortunately, most of these resources are located far from human habitation and are not readily accessible for human use. According to the United States Geological Survey (USGS), 96% of the world’s frozen freshwater is at the South and North Poles, with the remaining 4% spread over 550,000 k...
01 Oct 2009 - by Philippe Rekacewicz (Le Monde diplomatique)
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When the city harms its own water resources When the city harms its own water resources
In areas where surface water is not readily available (located far from areas of need), groundwater is the primary water source. Groundwater aquifers supply an estimated 20% of the global population living in arid and semi-arid regions. Despite their widespread presence, groundwater aquifers in arid areas receive only limited or seasonal recharge, making such aquifers susceptible to rapid depletion. The Northern Sahara Basin Aquifer, for example,...
01 Oct 2009 - by Philippe Rekacewicz
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The WWF living planet index for freshwater The WWF living planet index for freshwater
'The over-exploitation and mismanagement of fisheries, particularly when combined with other man-made stresses, can lead to the collapse of regional fish faunas. In many countries, aquaculture is rapidly increasing in response to declining natural fisheries, often exacerbating the degradation of inland and coastal ecosystems through habitat alteration, pollution and the introduction of alien species' (Revenga et al., 1998). The Freshwater Specie...
26 Jan 2009 - by GRID-Arendal
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Damming the world Damming the world
The construction of large dams - defined as those with walls at least 15 metres high - has increased significantly over the past 50 years. The average height of new dams, estimated at 30-34 m from 1940-1990, increased to about 45 m in the 1990s, due largely to construction trends in Asia. The average area and volume of freshwater reservoirs have also steadily increased, rising to about 50 km2 between 1945 and1970, declining through the 1980s to 1...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
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Estimated Residence time of water resources Estimated Residence time of water resources
Estimated Residence time of water resources
26 Jan 2009 - by Phillipe Rekacewicz, February 2008
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Who will not reach the water and sanitation millennium development goal? 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.
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
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Transboundary water governance - averting conflict Transboundary water governance - averting conflict
Most governments recognize that violence over water is seldom strategically workable or economically viable and the most hostile enemies have a capacity for cooperation where water is concerned. The institutions that they create to avert conflict have shown extraordinary resilience. The considerable time taken to negotiate the establishment of these institutions - 40 years for the Jordan agreement for example - bears testimony to the sensitivity ...
26 Jan 2009 - by GRID-Arendal
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Industrial areas and seasonal zones of oxygen depleted waters Industrial areas and seasonal zones of oxygen depleted waters
This graphic illustrates the strong link between areas with high densities of industrial activity and zones of seasonally oxygen-depleted waters. There is a strong link between areas with high densities of industrial activity and zones of seasonal oxygen-depleted waters. In recent years there has been an increasing focus on treating and reducing municipal and industrial waste, and on reducing nitrogen levels in agricultural runoff. However, less...
26 Jan 2009 - by Phillipe Rekacewicz, (Le Monde diplomatique) February 2008
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Total population: access to an improved water source Total population: access to an improved water source
The 2004 global image sadly shows that the lack of access to clean water remains a burden for the poorest countries, preventing them accelerating their development. Essentially handicapping most sub-Saharan African countries, the map shows some curious trends, such as Romania, which remains far behind all other European countries.
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
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Marine species diversity Marine species diversity
Limited information is available on species diversity and the condition of coastal and marine ecosystems (Burke et al., 2001). There is growing evidence that many marine species are less widely distributed, and therefore more vulnerable to extinction, than previously thought (GESAMP, 2001a). The protection and sustainable use of marine resources and biodiversity are governed by several international conventions, including the Convention on Biolog...
26 Jan 2009 - by World Resource Institute (WRI), Washington Dc, 1998, based on data from UNEP-WCMC.
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Impact of sea level rise on the Nile delta Impact of sea level rise on the Nile delta
Impact of sea level rise on the Nile delta. Sea level elevation model used to produce impact of nile delta sea level rise.
26 Jan 2009 - by Phillipe Rekacewicz, Otto Simonett - February 2008
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Lake Chad: almost gone 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 of these countries. Maps drawn from a series of satellite images show a dramatic decrease in the size of the lake over the past 30 years. Since 1963, the lake has shrunk to nearly a twentieth of its original size, due both to climatic changes and to high demands for agricultural water. Since 1963, the surfac...
06 Nov 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
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Global waterstress and scarcity 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 to satisfy all human or ecosystem requirements, resulting in increased competition between water users and other demands.
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
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Runoff-Typewriter Runoff-Typewriter
Graphics captions water run off annually water per continent. Run off is scaled km cubed per year.
26 Jan 2009 - by Phillipe Rekacewicz, February 2008
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Production mondiale annuelle de biocarburants Production mondiale annuelle de biocarburants
La production de biodiesel et d’éthanol a augmenté sensiblement au cours des dernières années
08 Jun 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Exportations agricoles totales Exportations agricoles totales
Les échanges céréaliers mondiaux dans le domaine agricole se sont accrus à un rythme constant au cours des dernières décennies. L’OCDE a toujours été une grande exportatrice nette de céréales, alors que l'Asie en est devenue une grande importatrice nette
08 Jun 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Estimation brute des niveaux de pertes, de conversion et de gaspillage d’aliments à différents stades de la chaîne d’approvisionnement alimentaire sur le plan mondial Estimation brute des niveaux de pertes, de conversion et de gaspillage d’aliments à différents stades de la chaîne d’approvisionnement alimentaire sur le plan mondial
Vers la fin des années 1990, les agriculteurs produisaient en moyenne l'équivalent de 4 600 kilocalories par personne par jour (Smil, 2000), c'est-à-dire avant la conversion d’aliments en fourrages. Après déduction des pertes, des conversions et de gaspillage à différents stades de la chaîne d'approvisionnement alimentaire, environ 2 800 kilocalories sont disponibles pour l'offre (aliments animaux et végétaux confondus) et, au bout de la chaîne, ...
08 Jun 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Pertes alimentaires par type de produit Pertes alimentaires par type de produit
Aliments consommés/perdus
08 Jun 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Tendances mondiales (1960–2005) Tendances mondiales (1960–2005)
Production de céréales et de viandes, et de l'utilisation d'engrais, de systèmes d’irrigation et de pesticides
08 Jun 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Augmentation de la production des principales cultures agricoles selon le rendement et la superficie cultivée (1965–2008) Augmentation de la production des principales cultures agricoles selon le rendement et la superficie cultivée (1965–2008)
L’accroissement des rendements a été dans l’ensemble supérieur à celui des superficies.
08 Jun 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
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