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Freshwater alkalinity: 1976-2008 Freshwater alkalinity: 1976-2008
Alkalinity is commonly used to indicate a water body’s capacity to buffer against acidity; that is, the ability to resist, or dampen, changes in pH. Thus, alkaline compounds in water, such as bicarbonates, carbonates, and hydroxides, lower the acidity of the water and increase the pH. Alkalinity (as CaCO3) was analysed for all sampling stations available at the continental level. Concentrations remained reasonably steady between the two decades ...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique), February 2006
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Coral reefs at risks Coral reefs at risks
There are two distinct regions in which coral reefs are primarily distributed: the Wider Caribbean (Atlantic Ocean) and the Indo-Pacific (from East Africa and the Red Sea to the Central Pacific Ocean). - The diversity of coral is far greater in the Indo-Pacific, particularly around Indonesia, the Philippines, and Papua New Guinea. Many other groups of marine fauna show similar patterns, with a much greater diversity in the Indo-Pacific region. ...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
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Regional CO2 emissions Regional CO2 emissions
World carbon dioxide emissions by region, 1950-2006. Under the terms of the 1992 United Nations Framework Convention on Climate Change (UNFCCC), countries that have contributed the most greenhouse gas emissions have a responsibility to dramatically cut emissions and to assist the most vulnerable peoples and regions to adapt.
03 Feb 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Victims and affected people in Pakistan flood, August 2010 Victims and affected people in Pakistan flood, August 2010
Seasonal fooding can occur along all the major watersheds in the Himalayan region (Figure 11–14). The largest problems occur in food prone areas with high population densities. This includes parts of northeast India, south-central Nepal, central and southern Pakistan, large parts of Bangladesh and lower reaches of the large rivers in China. In India around 40 million people are affected by fooding annually and the damage has been estimated...
15 Feb 2010 - by Riccardo Pravettoni
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Recent flood events in the Hindu Kush-Himalaya region Recent flood events in the Hindu Kush-Himalaya region
Since Asia comprises a large portion of the World’s popula- tion, and more than 40% of all the foods in the world occur in Asia, a large number of people are affected by disasters (Fig. 14). More than 40% of the people killed by natural di- sasters are killed in Asia (Fig. 15). In the ten-year period from 1999–2008, 402 foods were recorded in Africa, 342 in the Americas, 259 in Europe and 649 in Asia. In the same time period close to 1 bill...
03 Feb 2010 - by Riccardo Pravettoni
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Access to water in urban Africa Access to water in urban Africa
Improved water sources, defined as “one that is protected from outside contamination” (WHO/UNICEF 2010), is essential for ensuring the health of Africa’s urban dwellers. Although an increasing number of people have access to improved water, rapid urban population growth in the African region has equally increased the number of people without proper access.
18 Mar 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Population growth in North Sumatra and Aceh 1920-2008 Population growth in North Sumatra and Aceh 1920-2008
Overall population growth in the region has been very rapid during the past nine decades. In 1920, the human populations of Aceh and North Sumatra provinces were 736,348 and 1,961,678, respectively (Volkstelling 1922). By 2008, these had risen dramatically to 4,293,915 and 13,042,317 (BPS 2010a).
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Hydrogeology Hydrogeology
Most of the Sumatran orangutan's forests inland play a key role in ensuring downstream freshwater supplies, since the non-alluvial inland areas of the region tend to have very little or no underlying groundwater resources.
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Highway threaten Serengeti wildlife Highway threaten Serengeti wildlife
This graph shows proposed commercial roads across the Serengeti and surrounding region in 2010. However, following intense international pressure, the Tanzanian Government announced in 2011 that it will favour an alternative route to the South, outside the park. Some projections suggest that if the road were built, numbers may fall to less than 300,000 (Dobson and Borner, 2010), others that the herd could decline by a third (Holdo et al., 2011), ...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Humpback Whale movements within the South Pacific Humpback Whale movements within the South Pacific
Mortality due to entanglement and collisions with ships has been reported within the Southern Hemisphere. To varying degrees these threats are all present in both the Oceania region and the Southern Ocean. The International Whaling Commission’s Southern Ocean Whale Sanctuary and temporary moratorium against commercial whaling offers limited protection to Humpback Whales from commercial whaling, but scientific whaling remains a threat. There is...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Gender division of labour in agriculture and household activities - Nepal and India Gender division of labour in agriculture and household activities - Nepal and India
In Nepal, the gender division of labour is highly skewed, especially when agricultural, pastoral and wage labour is combined with household, community and casual labour, and when high rates of men’s out-migration to urban cities, towns and cross-border destinations in the region and beyond, are considered. Recent comparative research on the ‘feminisation’ of agriculture and natural resource management, undertaken by ICIMOD and supported by I...
05 Dec 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Recent flood events in the HIndu Kush-Himalaya region Recent flood events in the HIndu Kush-Himalaya region
Recent studies focus attention on the radically changed flood patterns, including heavy rainfall that leads to landslides and soil erosion. For example, in Nepal women and men have noted increased frequency and damage caused by the floods over a twenty-year time-span (Gautam et al., (2007). During floods, rivers may cut into agricultural land, inundate crops or wash the fields away in their entirety. Economically poor and marginalised households ...
05 Dec 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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