Freshwater plays a key role not only in maintaining health and welfare but also in providing security. Nonetheless, an estimated 3.6 billion people in the world lack access to safe water supplies at least for 30 days a year.
Alexander Leicht, officer-in-charge of the UNESCO Cluster Office in Tehran, made the statement Monday while addressing a panel on "The 2nd National Water Technology Festival: Unconventional Water (Salt and Waste Water)" at Ferdowsi University in Mashhad, Khorasan Razavi Province
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