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New page: 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 [[fre...
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.