On Cape Verde - it's one of planet Earth's 194 countries - farmers harvest clouds. No kidding! :)
I travelled 5,000 km from The Netherlands to Cabo Verde, to find out, last week, that it's possible to harvest a cloud. How? Big nets make the fog condense into droplets of liquid water that fall into a gutter below. The water passes through a tube, arriving in a tank. Ready to be distributed.
Where? On the island of Santiago in the 'Serra Malagueta Natural Park' the mountains are being shroud in an almost year-round mist of 'stratocumulus'. The fog of these clouds are being used for fog collection.
How much does in gain? A couple of nets collect 1,000 litres of water a night.
Old technology? Depends on your definition. Since the Stone Age 'homo sapiens' invented a couple of techniques to collect dew. Since the mid-1980s we invented modern ways to collect water from fog. The nets on Santiago on Cabo Verde are a spin-off of this development.
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