*[http://www.millenniumassessment.org/documents/document.355.aspx.pdf Ecosystems and Human Well-being: Desertification Synthesis], [[Millennium Ecosystem Assessment]], 2005. World Resources Institute, Washington,DC | *[http://www.millenniumassessment.org/documents/document.355.aspx.pdf Ecosystems and Human Well-being: Desertification Synthesis], [[Millennium Ecosystem Assessment]], 2005. World Resources Institute, Washington,DC |