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Monday, July 5, 2010

How the green house effect occurs

The green house effect
To understand green house effect, first we need to know how the temperature is regulated on earth. The earth absorbs heat energy that comes to the earth from the sun. Generally, these are the rays having shorter wavelength. To maintain a steady temperature on the earth, the earth too reflects or radiates the energy back to the atmosphere. During this process, shorter wavelength rays that came to earth returns back with longer wavelength. There are some of the gases in the atmosphere like carbon dioxide, methane which do not allow the longer wavelength rays to pass through them. They act as blankets over the surface and help in warming up the earth.
Therefore, global temperature is maintained on the earth with nearly 30ÂșC warm, providing a suitable condition for the survival of human beings. This is named as green house effect as the glass in a green house also possesses the similar features to the atmosphere. It has been really advantageous in the agricultural field because using this method, non- seasoned crops can be grown at any time and the crops will not need to be specified to a certain area.
Even the beneficial thing can sometimes have a negative impact. Similarly, due to the rapid increase of the green house gases, it has proven to be threatening as the temperature of earth is being rapidly increased and human beings and other living organisms are being more prone to the effect of climate change.
Human activities such as burning of fossils fuels (coal, oil and gas) and emission of gases from the vehicles have increases the amount of carbon dioxide and methane in the atmosphere. These gases lead to increased global warming.


It is of great concern that we are more likely to experience change in terms of extreme weather such as floods, droughts and storms due to natural variability in climate. It is thought that these hazards will be more intense with the global warming.

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