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Define global warming briefly?
Global warming is the rise in the average temperature of earth's atmosphere .Green house gases and solar forcing affect temperatures in various ways .Global warming happens when green house gases such as carbondioxide ,water vapour ,nitrous oxide and methane trap heat and light from the sun in the earth's atmosphere which increases the temperature .This badly affect people ,animals and plants .
           The effects of an increase in global temperature include a rise in temperature  in sea levels and change in the amount and pattern of precipitation .The increase in the ocean heat contents is much larger than any other of energy .


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