The central theme is the human causes and consequences of desertification in the drylands of Africa. An attempt has been made to unravel the changing views on the human causes, this is followed by a brief outline of the intervening plans and actions to stem the problem. A significant...
(UNEP), the rate of desertification is speeding up. Almost a third of the land in the U.S. is affected by desertification, and one quarter of Latin America and the Caribbean, and one-fifth of Spain. Africa is the worst affected continent; with two-thirds of its land either desert or ...
(UNCOD) inNairobi,Kenya, representatives and delegates first contemplated the worldwide effects of desertification. The conference explored the causes and contributing factors and also possible local and regional solutions to the phenomenon. In addition, the delegates considered the varied consequences of...
shrublands, and drylands. The rapid global urbanization and land reclamation only serve to aggravate both causes and effects of desertification. Worse, it leaves us with much less land to use for growing food, which—in a world where 95% of nutritious...
The first conference on desertification has been called at Nairobi (1977) in the wake of six years of killing drought in the Sahelian region in Africa for comprehensive assessment and action to stem the spread of deserts. 4. Mechanism of Desertification: ...
the same process ofdesertification is taking place across southern africa as the kalahari desertadvances into botswana and parts of south africa.one ofthe major causes of this desert advance ispoor agricultural land use, driven by the pressures of increasing population.overgrazing一 keeping too many ...
Firewood in these areas is often converted to charcoal in earthen kilns before it is used, because charcoal gives off less smoke than wood. The conversion process is often inefficient, however, with about 75 percent of the wood’s heating potential lost. In Africa and Asia a very rough ...
作者: Tatyana A Saiko and Igor S Zonn 摘要: The aim of this paper is to examine the causes and dynamics of desertification in one of the world's worst disaster areas, the Aral Sea region. During the 1960s, a large-scale irrigation campaign aimed at achieving independence in cotton ...
In addition, the change trends of actual NPP, potential NPP and HNPP (human appropriation of NPP, the difference between potential NPP and actual NPP) were used to analyze the desertification dynamic and calculate the relative roles of climate change, human activities and a combination of the ...
it begins with an initial climate event, goes through drought, desiccation, and desertification and eventually results in the establishment of a desert; the people most susceptible to desertification inhabit regions of South and East Asia, Sub-Saharan Africa, North Africa, and the Middle East, incl...