The UN Environment Programme, based in Nairobi, periodically assesses the world's environment in Global Environment Outlook (GEO). This report can be downloaded as a PDF file as well as a set of free online data tables. GEO includes a neat summary of the extent, causes and severity of land degradation in different regions, as well as the relationship between biodiversity, climate change and land. GEO also includes data tables on how much land is under cultivation; the area of land being irrigated; and trends in fertiliser consumption. GEO is among the premier resources for factual information on dry lands, although its website's navigation could be improved. More for specialist readers.


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