Causes of Global Warming

Global Warming is a major issue due to the industrialization and progress by humankind since the past few years. Global warming has been caused due to a various number of factors. Global warming is basically a change in the climatic conditions of the earth. Changes to climatic conditions and therefore Global Warming can be caused to natural or man-made circumstances also. Some of the factors causing global warming are volcanic emissions and solar activity.

According to the solar variation theory, the sun has been gaining strength and is at it's strongest since sixty years. Therefore, it may now be acting as a cause of global warming. Sunspots are also said to be a cause for Global Warming. The sun is the main source of energy to the earth.

The greenhouse effect is said to be the most important factor regarding global warming. When infrared radiation from the atmosphere increases the temperature of the earth's surface, it is termed as the greenhouse effect. The greenhouse effect has increased the earth's temperature by about twenty four percent. Carbon dioxide contributes about 12% of the greenhouse effect, while water vapor contributes 36% of the greenhouse effect. Methane causes five to 10% of Global Warming, while Ozone makes around 3% to 7% of the greenhouse effect possible.

Solar variation is said to be another reason of Global Warming. The changes in the amount of radiant energy emitted by the Sun are known as solar variation. This solar variation has been correlated with the changes in the Earth's climate and temperature.

Along with the natural causes of Global Warming, scientists have also contributed rapid industrialization to the increase of Global Warming today. Scientists are of the opinion that industrialization releases various gases like carbon-dioxide and methane which are known to contribute to Global Warming. Deforestation is also said to increase global warming. Trees contain a high level of carbon, and therefore their cutting creates an increase of carbon in the atmosphere. Humankind also contributes to the increase of carbon dioxide by the burning of fossil fuels. The contribution of humankind to global warming due to the burning of fossil fuels has increased by about eighty percent in the past twenty years.

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Rajesh Kansal