What is Green House Effect in biology

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Green House Effect

"<yoastmarkThere is about 78% nitrogen and 21% oxygen in the atmosphere and in the rest 1%, argon (0.93%), carbon dioxide (0.32%) and other gases are included. The gas like carbon dioxide has the characteristic that is is permeable for solar radiations of shorter wavelength but it reflects radiations of longer wavelength which are warm. Hence visible and ultraviolet ray emitted from sun pass through carbon dioxide without any interruption but infrared radiations on returning after striking to the land are stopped due to the presence of carbon dioxide and other gases.

As a result of this heat is collected in the lower portion of the atmosphere which thus gets warmed up. this is called green house effect because it work as a green house cannot return to the atmosphere and in this way the temperature of the green house increases.

Causes of green house effect


The main cause of green house effect is the gases such as carbon dioxide, Methane, Nitrous oxide, Chlorofluorocarbon etc. which are now also called green house gases. A very distinct change has taken place in the combination of green house gases in the lower atmosphere. Since 1958 carbon dioxide is directly measured in the mona loa observatory situated in the hawaii in america. Mona Loa volcano is the obsolescent volcano of Hawaii. It is the most appropriate place to measure the accurate concentration of carbon dioxide as it is situated at high altitude.

Green house gases

  • Carbon dioxide:-

Before industrialization the quantity of carbon dioxide in the atmosphere was 280 ppm (280 co2 molecule/million air molecules). This quality is reached up to 340 ppm in 1980 and up to 368 ppm in 2000.If even now measures are not taken to stop it is assumed that it will reach upto 560 ppm by the year 2050. This increase is due to the burning of fossil fuel deforestation and the change in the utilization of land.

  • Methane:-

The second main green house gas that affects the global climate is methane. It is the byproduct of incomplete decomposition which is produced by methanogen bacteria under anaerobic condition. Methane is also produced by bio gas.

  • Nitrous oxide :-

There is increase of 0.2-0.3% in the concentration of nitrous oxide every year due to the blind use of fertilizers burning of fossil fuel and animal wastes.