A greenhouse (also known as a glasshouse or, if heated properly, a hothouse) is a structure with walls and roof composed primarily of transparent material, such as glass, in which plants that require controlled climatic conditions are produced. These structures come in a variety of sizes, from modest sheds to large industrial constructions.

The term “cold frame” refers to a tiny greenhouse. When a greenhouse is exposed to sunshine, the interior temperature rises significantly above the outside temperature, shielding the contents from the elements.

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