abstract desertification could cause reduction of the ecological and biological potential of land which may occur both naturally and artificially. identifying and evaluating the effective factors in development of desertification is very important for better management of land. the aim of this research is to evaluate the sensitive input parameters in the desertification condition by using of ar...

Bulletin © . This issue was written and edited by Tomilola “Tomi” Akanle and Kunbao Xia. The Editor is Anna Schulz . The Director of IISD Reporting Services is Langston James “Kimo” Goree VI . Funding for coverage of this meeting has been provided by the UN Environment Programme (UNEP). IISD can be contacted at 161 Portage Avenue East, 6th Floor, Winn...

Food insecurity and hunger are widespread in sub-Saharan Africa (SSA). Food security implies the provision of safe, nutritious, and quantitatively and qualitatively adequate food, as well as access to it by all people. The chronic food insecurity in SSA is largely due to the fact that 85-90 per cent of agriculture is rain-fed and accounts for 35 percent of the region’s gross national product (G...

The United Nations Environment Programme (UNEP) is currently coordinating negotiations to develop a binding global agreement by late in the year 2000 to prohibit, restrict, or reduce the production, use, or release of certain persistent organic pollutants (POPs). POPs are a small subset of organic chemicals whose characteristics of persistence in the environment, accumulation in biological orga...