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An underground greenhouse, often called a walipini, is a sunken outdoor structure designed to keep plants alive year-round by levering the insulation properties of the surrounding earth.
Passive annual heat storage is a building concept theorized to create a year-round constant temperature in an earth shelter by means of direct gain passive solar heating and a thermal battery effect lasting several months. It is claimed that an earth shelter designed according to these principles would store the sun's heat in the summer and ...
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]
Despommier suggests that once dwarf versions of crops (e.g. dwarf wheat which is smaller in size but richer in nutrients [56]), year-round crops and "stacker" plant holders are accounted for, a 30-story building with a base of a building block (2 hectares (5 acres)) would yield a yearly crop analogous to that of 1,000 hectares (2,400 acres) of ...
Portable Greenhouse. This large walk-in greenhouse features zippered front and back doors in addition to exhaust vents, a coated steel frame, and an airtight, UV-protected cover.
Air warmed by the heat from hot interior surfaces is retained in the building 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. Polytunnels are mainly used in temperate regions in similar ways to glass greenhouses and row covers.
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