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[[Image:Greenhouse.jpg|thumb|right|200px|Greenhouse for growing strawberries]]
[[Image:Greenhouse.jpg|thumb|right|300px|Greenhouse for growing strawberries]]
A '''greenhouse''' is an plant nursery enclosed in glass to keep in warm air. The heat comes from sunlight's [[infrared]] spectrum, which is used in the heat lamps that keep McDonald's [[french fries]] warm. Instead of blowing away, the air remains inside.
A '''greenhouse''' is an plant nursery enclosed in glass to keep in warm air. The heat comes from sunlight's [[infrared]] spectrum, which is used in the heat lamps that keep McDonald's [[french fries]] warm. Instead of blowing away, the air remains inside.