Mineral Fertilizer Use and the Environment International Fertilizer Industry Association United Nations Environment Programme
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UNDP’s 1998 Report
UNDP’s 1998 World Human Development Report emphasizes the fact that it is the poor which are hit hardest by environmental degradation. Past deterioration of resources worsens current poverty. This renders very difficult the important tasks of the preservation and restoration of agricultural resources, reforestation, prevention of desertification, the fight against erosion and soil nutrient replenishment. It is a vicious circle. Individuals confronted with poverty are obliged to over- exploit resources, which risks exhausting them, which in turn increases their poverty. The poor will be increasingly pushed to live on fragile land; by the end of the next decade it is possible that a billion poor people will have to live on fragile land as against 500 million today. The problem of land degradation is most serious in Africa and Asia, with two thirds of the world’s poor. The problem of land degradation is worse in arid areas. And this is not particular to 42 Mineral Fertilizer Use and the Environment developing countries. The continent which has the largest area of arid land subject to desertification is North America (74%), just ahead of Africa (73%). Deforestation is another problem. Almost a third of the earth’s forest have disappeared and about two thirds of those which remain are subject to serious modifications. Forests retain and regulate water and their destruction can lead to floods and drought. Today about a third if the world’s population depends on renewable resources. By 2025 a substantial proportion of the population of sub- Saharan Africa and South Asia will depend largely on these resources, as will a substantial number in Latin America and the Caribbean. The area of arable land per person is likely to be half the present low level of 0.27 ha. By 2050 more than two billion people will live in regions with a land shortage, due to desertification and degradation, in particular in South Asia and sub- Saharan Africa. In the world as a whole, the use of water is increasing rapidly. By 2025 it will have increased by 40%. By 2050 the number of people suffering from a water shortage will increase from 132 million to between 1 and 2.5 billion. Almost two thirds of the world’s population will be confronted with a moderate or high shortage of water. Some believe that water will be an important cause of wars in the 21 st century. Download 213.65 Kb. Do'stlaringiz bilan baham: |
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