The amount of water in air is assessedas 14,000 km3, while the amount of fresh water in the earthis about 1200 km3 (Hamed et al. 2010). Despite this significantvolume of potentially extractable fresh water in& B. Khalilbahaa.e.khalil@mcgill.ca; bahaa_khalil@rocketmail.com1 Department of Bioresource Engineering, McGill University,Macdonald Stewart Building, 21111 Lakeshore Road,Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada2 Department of Civil Engineering, Faculty of Engineering,Mataria, Helwan University, Cairo, Egypt3 Department of Environmental Protection and Development,Faculty of Environmental Engineering, Warsaw University ofTechnology, Warsaw, Poland123Sustain. Water Resour. Manag. (2016) 2:71–86DOI 10.1007/s40899-015-0038-zmany places where weather conditions favor dew formation,dew water collection systems are rare, suggesting dewcollection is an under-explored alternative for providinggood quality water.
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