Climate change is the fluctuation in the climate condition that may range for a long period of time from decades to millions of years. It may be limited to a small area or may even cover the whole earth. It is generally referred to as Global Warming.
HUMAN CAUSES
• Human uses fossils fuels excessively to generate power. Excessive use of the fossils fuel results in
the rapid emission of green house gases. Carbon dioxide is one of the major gas that is emitted and is responsible for the global warming.• Besides this, there are CFC gases that come out from house equipments like refrigerator and ACs and these gases too help in increasing the temperature of earth.
• Human emits carbon dioxide through different ways. Nevertheless, there are seas which absorb these gases. But the problem is that these oceans absorb green house gases very slowly. So, there is great probability of rapid increase of global warming.
• Deforestation in large scale has lower the number of trees to absorb carbon dioxide for photosynthesis and this is also one of the human cause of global warming.
• Cultivation of paddy in the fields also adds methane in the atmosphere.
• The release of nitrous oxide from agriculture and manufacturing activities traps three hundred times more heat than carbon dioxide. it has been recorded that the level of nitrous oxide has been rapidly increased since the pre industrial era.
NATURAL CAUSES OF GLOBAL WARMING
Human causes are not the sole cause of increasing issue of global warming. Many natural causes have been found out to be responsible for global warming by the scientists. They include:
• Continental drift and mountain formation
• Changes in the orbit of the earth
• Volcanic eruption
• Solar variability
• Fluctuation in solar energy.
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