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… Competition over water resources could cause a global 18% reduction in the availability of water for agriculture by … rest of the century. 38 • By 2050, the number of people at risk of hunger as a result of climate change is expected to … http://www.brookings.edu/research/reports/2012/03/natural-disaster-review-ferris 41. IFAD: Desertification, 2010, p.2, …