A picture taken on March 20, 2013 in Marseille, southern France, shows a drop of water that reflected a map of the earth. World Water Day is held annually on 22 March to draw attention on the importance of freshwater and advocating for the sustainable management of freshwater ressources. An international day to celebrate freshwater was recommended by the 1992 United Nations Conference on Environment and Development (UNCED). AFP PHOTO / GERARD JULIEN (Photo credit should read GERARD JULIEN/AFP/Getty Images)
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