Soil erosion is considered to be one of the greatest environmental problems of sub-Saharan Africa. This paper investigates the advantages and disadvantages of modelling soil erosion at the continental scale and suggests an operational methodology for mapping and quantifying 10-daily water runoff and soil erosion over this scale using remote sensing data in a geographical information system framework.
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Mostrando ítems 1 a 9 de 1962.-
Library ResourceArtículos de revistas y librosDiciembre, 2010África
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Library ResourcePublicación revisada por paresArtículos de revistas y librosDiciembre, 2012África subsahariana, Asia meridional, África, Asia, América del Sur, Américas
The year 2011 highlighted ongoing challenges to global food security, from food price volatility, extreme weather shocks, and famine to unrest and conflicts. On the policy front, major developments at the global and national levels both offered grounds for encouragement and pointed to areas where further action is needed.
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Library ResourcePublicación revisada por paresArtículos de revistas y librosDiciembre, 2012África subsahariana, Asia meridional, África, Asia, América del Sur, Américas
The year 2011 highlighted ongoing challenges to global food security, from food price volatility, extreme weather shocks, and famine to unrest and conflicts. On the policy front, major developments at the global and national levels both offered grounds for encouragement and pointed to areas where further action is needed.
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Library ResourcePublicación revisada por paresArtículos de revistas y librosDiciembre, 2012África subsahariana, Asia, África
Depuis 2007, deux séries successives d’envolée des prix des denrées alimentaires ont causé la faim ou la malnutrition pour des millions de personnes dans le monde. Les mêmes facteurs qui avaient contribué à la hausse des prix en 2007-2008 ont refait surface en 2011 et ont pour nom : la baisse du taux de croissance de la productivité agricole, le niveau élevé du coût de l’énergie favorisant l’expansion de la production de biocarburants, la dépréciation du dollar américain, une forte demande des pays émergents en matière de produits agricoles et les bouleversements climatiques.
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Library ResourceInformes e investigacionesDiciembre, 2013África oriental, África occidental, África austral, África Central, África subsahariana, Asia meridional, África, Asia
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Library ResourcePublicación revisada por paresArtículos de revistas y librosDiciembre, 2013Asia meridional, Asia oriental, África subsahariana, América del Sur, África, América Septentrional, Brasil, China, India, Estados Unidos de América, Europa
This 2012 Global Food Policy Report is the second in an annual series that provides an in-depth look at major food policy developments and events. Initiated in response to resurgent interest in food security, the series offers a yearly overview of the food policy developments that have contributed to or hindered progress in food and nutrition security. It reviews what happened in food policy and why, examines key challenges and opportunities, shares new evidence and knowledge, and highlights emerging issues.
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Library ResourceDocumentos de política y resúmenesDiciembre, 2013Asia meridional, Asia oriental, África subsahariana, América del Sur, África, Asia, América Septentrional, Brasil, China, India, Estados Unidos de América
This 2012 Global Food Policy Report is the second in an annual series that provides an in-depth look at major food policy developments and events. Initiated in response to resurgent interest in food security, the series offers a yearly overview of the food policy developments that have contributed to or hindered progress in food and nutrition security. It reviews what happened in food policy and why, examines key challenges and opportunities, shares new evidence and knowledge, and highlights emerging issues.
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Library ResourceDocumentos de política y resúmenesDiciembre, 2013Asia meridional, Asia oriental, África subsahariana, América del Sur, África, Asia, América Septentrional, Brasil, China, India, Estados Unidos de América
This 2012 Global Food Policy Report is the second in an annual series that provides an in-depth look at major food policy developments and events. Initiated in response to resurgent interest in food security, the series offers a yearly overview of the food policy developments that have contributed to or hindered progress in food and nutrition security. It reviews what happened in food policy and why, examines key challenges and opportunities, shares new evidence and knowledge, and highlights emerging issues.
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Library ResourceDocumentos de política y resúmenesDiciembre, 2013Asia meridional, Asia oriental, África subsahariana, América del Sur, África, Asia, América Septentrional, Brasil, China, India, Estados Unidos de América
This 2012 Global Food Policy Report is the second in an annual series that provides an in-depth look at major food policy developments and events. Initiated in response to resurgent interest in food security, the series offers a yearly overview of the food policy developments that have contributed to or hindered progress in food and nutrition security. It reviews what happened in food policy and why, examines key challenges and opportunities, shares new evidence and knowledge, and highlights emerging issues.
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Library ResourceArtículos de revistas y librosDiciembre, 2013Caribe, África septentrional, África oriental, Asia oriental, Asia meridional, Europa oriental, África austral, África subsahariana, África, Asia
The 2013 Global Hunger Index (GHI), which reflects data from the period 2008-2012, shows that global hunger has improved since 1990, falling by one-third. Despite the progress made, the level of hunger in the world remains “serious,” with 870 million people going hungry, according to estimates by the Food and Agriculture Organization of the United Nations.Across regions and countries, GHI scores vary considerably. South Asia and Africa south of the Sahara are home to the highest GHI scores.
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