What is "fog collection"

n. The collection of water from fog, using a canvas to pick up the water particles.

300px|thumb|miniaturadeimagen|"Atrapanieblas" or fog collection in Alto Patache, Atacama Desert, Chile. Fog collection refers to the collection of water from fog using large pieces of vertical canvas to make the fog condense into droplets of water and flow down towards a trough below the canvas, known as a fog fence.

Through a process known as condensation, atmospheric water vapour from the air naturally condenses on cold surfaces into droplets of liquid water known as dew. The phenomenon is most observable on thin, flat, exposed objects including plant leaves and blades of grass. As the exposed surface cools by radiating its heat to the sky, atmospheric moisture condenses at a rate greater than that of which it can evaporate, resulting in the formation of water droplets.