Greenhouse

The artificial house which is made by glass or plastic inside which the temperature will be more than the outer environmental temperature is called greenhouse. The artificial greenhouse provides controlled environment for plants.

Advantages of artificial greenhouse

1. It provides the controlled environment for plants inside it. The plants which can be found in the desert can be grown in the Himalayan region inside it.
2. Those plants which are obtained in summer can be planted in winter inside it.

The earth as natural greenhouse

Various gasses are present in the atmosphere for example oxides of carbon, oxides of nitrogen and others act as a natural blanket for the earth. So, they let the short wave light rays of the sun reach the earth surface. But when the long wave light ray tries to return back to space, the layer of this gaseous layer and remain trapped in the earth. This is called natural greenhouse effect and earth act as a natural greenhouse.

Disadvantages of greenhouse effect:

1. Global warming is caused by the greenhouse effect. It influences forests directly the plants found in the tropical region are also found in the temperate region gradually. It may cause melting of snow at polar region. It may increase sea level by which many islands will disappear into oceans.
2. Agriculture system is badly affected.
3. The water cycle is also affected by the greenhouse effect.
4. Due to change in temperature of the earth, man skin and eye diseases will be caused.
5. It is helping in spread of harmful insects
6. It is causing the adverse effect on the ecosystem.