Changes

Construction, operation & maintenance
==Construction, operation & maintenance==
[[Image:Dropnet.JPG|thumb|right|300px|New design of fog nets called the [http://www.designboom.com/weblog/cat/8/view/9269/imke-hoehler-dropnet.html Dropnet ] by German designer Imke Hoehler.]]
Once a polypropylene net is obtained, use it correctly in a double layer. This is normally either polypropylene or polyethylene, u/v protected, with 35% shade coefficient, Raschel mesh weave, and a 1mm fibre size. Efficiency increases with smaller mesh sizes and fibre width.
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