What is Tunnel Plastic House?

What  is Tunnel Plastic House?

A polytunnel (also known as a polyhouse, hoop greenhouse or hoop house, grow tunnel or high tunnel) is a tunnel typically made from Steel or Bamboo and covered in polythene, usually semi-circular, semi-triangle rectangle or elongated in shape. The interior heats up because incoming solar radiation from the sun warms plants, soil, and other things inside the building faster than heat can escape the structure. Air warmed by the heat from hot interior surfaces is retained in the tunnel by the roof and wall. Temperature, humidity and ventilation can be controlled by equipment fixed in the polytunnel or by manual opening and closing of vents. This allows fruits and vegetables to be grown at times usually considered off season; market gardeners commonly use polytunnelsfor season extension.