Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case Hugo Ahlenius, UNEP/GRID-Arendal)
Bai ZG, Dent DL, Olsson L and Schaepman ME 2008. Global assessment of land degradation and improvement 1: identification by remote sensing. Report 2008/01, FAO/ISRIC – Rome/Wageningen
Uploaded on Tuesday 21 Feb 2012
Trends in productivity 1981-2003 (greening and land degradation)
Hugo Ahlenius, UNEP/GRID-Arendal
Unsustainable practices in irrigation and production may lead
to increased salinization of soil, nutrient depletion and erosion.
An estimated 950 million ha of salt-affected lands occur
in arid and semi-arid regions, nearly 33% of the potentially arable
land area of the world. Globally, some 20% of irrigated
land (450,000 km2) is salt-affected, with 2,500–5,000 km2 of
lost production every year as a result of salinity (UNEP, 2008).