I will search the internet
Ay! I found that :
Nets to catch the clouds
In Chungungo, there was a lack of water to drink and cultivate; so much that you had to buy water and bring it in by tanker. This village in Chile is located in a very arid desert. But in Chungungo, there is often fog. But fog is water in microscopic droplets floating in the air. In 1992, Canadian scientist Robert Schemenauer and Chilean collaborators developed a technique to collect water from fog. These are nets similar to those used in volleyball. Passing through the cracks, the mist leaves behind droplets, which trickle down into a gutter. This drinking water is then transported to a tank.
Result: water is no longer lacking in Chungungo. Vegetable gardens and orchards have multiplied.
Today, two other countries benefit from this technology. They are Peru and Ecuador.
But also a little more explicit links:
http://www.esj-lille.fr/atelier/js/js00/a4.htm
ou
http://archive.idrc.ca/nayudamma/fogcatc_72f.html
Is that what you were thinking when asking your question?