Green house is a house made of glass which is used to grow plants in it. This short waves of the sunlight can enter in it but long waves can not pass out from it. So inside a glass house is warmer than outside. As a result the temperature of the artificial green house is increased. Therefore un-seasonal plants also can be grown into the green house. The phenomenon of increase in the temperature of the earth as in artificial green house is called green house effect. In this phenomenon, the solar radiation is absorbed in the atmosphere. In this way, since the heat obtained from the sun is stored, the temperature of the earth increase.
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