Sunday, October 21, 2012

The Causes of Global Warming

The Causes of Global Warming

The climate of our planet varies depending on internal or natural processes, volcanic eruptions or changes in the Earth’s orbit. The growth in the Earth’s temperature over the last 50 years was the results of several underlying causes, both natural and man-made. Greenhouse gases are those gases that contribute to the greenhouse effect. This causes are either caused by nature or by several human activities, such as the burning of fossil fuels.

Greenhouse gases are released both by nature and human activities. In the wild, methane, a greenhouse gas, is released from arctic tundra and wetlands. The Earth is also bound to undergo a cycle of climate change, that usually lasts about 40,000 years.

However, man-made causes are the most numerous and the most damaging. Pollution, mainly caused by the burning of fossil fuels, is the main factor that disrupts the Earth’s climate. When these fuels are used, or coal and oil are mined, CO2 is released into the atmosphere.

Fossil fuels are used at a greater scale since there are more and more people driving a car, using transportation and more agriculture. Another source of methane is manure, produce by more animals raised for food. Trees are being cut down to make room for homes and buildings, that would convert our CO2 to oxygen. Buildings structure alone account for about 12% of CO2 emissions.

Deforestation is the second cause of atmospheric carbon dioxide. 34 million acres are being cut down each year, leading to 25% of all carbon emissions entering the atmosphere. The forests that we are losing every year can account for an absorption rate of 2 billion tons of carbon annually.

Click here

No comments:

Post a Comment