Paragraph on green house effect.
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Greenhouse effect is a process caused by the green house gases during which thermal radiations of the earth’s surface gets absorbed which again re-radiated to all directions instead of escaping back to the space. Re-radiation of the heat increases temperature in the lower atmosphere of the earth which elevates the average surface temperature. Green house gases make a sheet like blanket in the atmosphere which allows heat to come inside however does not allow them to go outside and increase earth’s temperature. There are many gases come under the category of green house gases but four major gases are named as water vapour, methane, carbon dioxide and ozone.
Some other gases like clouds which are considered as non-gas contributor to the greenhouse effect, but truly they absorb and emit infrared radiations and thus involves in green house effect. There are many reasons of increasing green house gases in the atmosphere however one main reason is human activities such as burning fossil fuels in various ways, clearing of forests, etc causes global warming. Incoming radiations from sun become visible lights having temperature of 6,000 K which gets absorbed by the earth’s surface and disturbs the whole ecological balance.
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A green house is made up of glass allow the sun's heat to get in but doesn't allow to go out. The trapped heat provides the required warmth to the plants in the green house. The trapping of earth 's atmosphere is similar. This is called green house effect. Hope it will help you