Greenhouse

A greenhouse isbuilding where plantscultivated. A greenhousebuiltglass or plastic;heats up becausesun's incoming electromagnetic radiation (particularly infrared light) warms plants, soil,other things insidebuilding. Air warmed byheat from hot interior surfacesretained inbuilding byroofwall.

The glass used forgreenhouse acts asselective transmission mediumdifferent spectral frequencies,its effect istrap energy withingreenhouse, which heats bothplants andground inside it. This warmsair nearground,this airprevented from risingflowing away. This can be demonstrated by openingsmall window nearroof ofgreenhouse:temperature drops considerably. Greenhouses thus work by trapping electromagnetic radiationpreventing convection.

Greenhousesoften usedgrowing flowers, vegetables,fruits. Bumblebees arepollinatorschoicemost greenhouse pollination, although other typesbees have been used, as well as artificial pollination.

Compare: greenhouse effect

External link: North Carolina State University Greenhouse Food Production website