On the edge of the Sahara, in southwest Morocco, giant nets catch moisture from the air, turning fog into drinking water.
The technique involves a fine mesh on which tiny fog droplets -- typically 1 to 40 millionths of a meter -- gather and merge until they have enough weight to travel down into a reservoir.
Set in a dry, mountainous area, it's the world's largest functioning fog collection project, spanning 600 square meters, according to Dar Si Hmad, the women-led Moroccan NGO that runs it.
The pilot project now provides clean drinking water to 500 people in five villages, in a region that has been severely hit by climate change-induced droughts.
http://edition.cnn.com/2016/11/18/afric ... s-morocco/
The technology is also in use in other places, including in what it thought to be the driest non-polar desert in the world, the Atacama desert plateau in South America.