The concept of greenhouse effect evolved from the greenhouse which actually means a glass house built to protect trees from cold air. As these green houses are made of glass, they trap the sunlight and do not let it escape. This trapped sunlight keeps the interior of the house hot for the tree to prepare food. In the atmosphere, a similar thing takes place where carbon dioxide and carbon mono oxide, which are known as the green house gases, cause the greenhouse effect. Due to various reasons these two gases are increasing in the air. This increased heat is not only causing an imbalance in our ecology, but also melting the ice of the polar region, as a result raising the sea-level.
There are many causes of greenhouse effects. The deforestation and burning down of the tropical forests, rapid growth of unplanned industries, overpopulation, pollution, increase of temperature etc. are the causative factors of greenhouse effect.
In the recent years it has been noticed that the world temperatures are increasing day by day. This increase in global warming is caused by the increased amount of carbon dioxide gas around the earth. Like the glass houses for the plants in the western cold countries, our atmosphere is guarded by ozone layer which resists the entrance of ultra violet ray from the sun. if such condition goes on for a long time , the world would be hotter. There will be drought throughout the world. There will be an increase in violent storm. The rivers will overflow their banks causing frequent floods. Greenhouse effects make the climate warm. So, the ice in the arctic region would be melting. Many islands, cities near the sea, many parts of our country will go under water of the sea.
To prevent the dangerous effects of greenhouse necessary steps should be taken immediately. People should not be allowed to cut off trees, because trees play an important role in fighting the greenhouse effect. Campaign for tree plantation should be introduced. Mills and factories should be set up in a very planned way.
The climate of the world is undergoing a significant change. The temperatures are increasing day by day on account of green house effect. So measures should be taken to prevent such an undesirable situation.
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| | | | | The mechanism by which Carbon dioxide increase the temperature is also interesting. The atoms of Carbon dioxide, absorb infrared radiation and the molecule starts to vibrate. Eventually, the vibrating molecule will emit the radiation again, and it will likely be absorbed by yet another greenhouse gas molecule. This absorption-emission-absorption cycle serves to keep the heat near the surface, effectively insulating the surface from the cold of space. |
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