Unconventional water source: Fog collection (IMAGE)
Caption
The atmosphere contains an estimated 13,000 km3 of water vapour, some of which can be captured through cloud seeding and the collection of water from fog and mist. Remote communities in Chile, Morocco, and South Africa have used vertical mesh nets to harvest fog for over 100 years, and there are viable sites for fog harvesting on every continent. Advancements in materials and indigenous knowledge have helped develop highly productive, relatively low cost, environmentally-friendly designs to collect potable water – more than 20 litres on a dense fog day for every square metre of mesh. At an overall cost of less than $250 per square metre of mesh lasting more than a decade, some 75,000 litres per square metre is produced at a cost of just 33 cents a litre.
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Aqualonis
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