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The area of greenhouse cover is still increasing at a fast rate, during the last decade it is estimated that it has been growing by 20% every year. Areas such as the Middle East and Africa are growing in their use of plastic greenhouses by 15-20% per year, compared to the weak growth in more developed and economically stable areas such as Europe.
Twinwall plastic most commonly refers to two exterior plastic sheets that are connected with a plastic support layer to create parallel channels. This design adds both impact toughness and the ability to support weight. Twinwall plastic may also be used to describe a pipe that has a smooth interior with exterior air filled ridges. [3]
The terms greenhouse, glasshouse, and hothouse are often used interchangeably to refer to buildings used for cultivating plants. The specific term used depends on the material and heating system used in the building. Nowadays, greenhouses are more commonly constructed with a variety of materials, such as wood and polyethylene plastic. [2]
In El Ejido, a Mediterranean city known for its sprawling greenhouses, a hailstorm broke hundreds of car windscreens, flooded the streets and damaged the mostly plastic greenhouse infrastructure.
Better materials improve efficiency. A single sheet of plastic can replace the branches and leaves. Greater efficiency arises because the plastic is waterproof, preventing water vapour from escaping. The sheet is attached to the ground on all sides with stones or earth. Weighting the centre of the sheet forms the funnel.
Do not use synthetic materials (polyester), plastic tarps, or sheets of plastic because they do not breathe and can trap heat and moisture that can damage the plant. Remove the covering as soon as ...
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