At Cleantech 2012 the JNF demonstrated that it has enriched Israel’s economy by 260 million cubic meters of water. This water is collected drop by drop from floods in the Negev and Galilee and from sewage treatment facilities across the country.
http://www.israelnationalnews.com/News/News.aspx/157481
http://www.youtube.com/watch?feature=player_embedded&v=K_-mtFUrf40