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Global Warming Essay-APA Sample

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GLOBAL WARMING

Within the atmosphere, there are small amounts of important gases called “green house gases”. They act like insulating blanket around the planet by trapping and returning to the earth surface much of its outgoing heat (Asped, 2009). This provides a livable climate on earth. However, increased concentration of these gases, leads to trapping of more heat near the earth surface resulting into a warmer atmosphere. The situation where by the temperature of the earth surface is more than the average is termed as global warming. A warmer atmosphere holds more water vapor that amplifies the warming. Besides, the increase in airborne moisture results in more clouds which obstructs sunlight and limits or modulates warming (Nguyen, 2008).
Global warming has both natural and anthropogenic causes. Release of methane gas in to the atmosphere from wetlands is one of the natural causes (Jenicek, 2010). Besides, arctic tundra also releases methane gas. By methane being a green house gas, it leads to increased concentration of green house gases thus enhancing the global green house effect, trapping more heat near the earth surface. However, green house gases concentrations are affected drastically by human (anthropogenic) activities. Pollution is the main cause of global warming, for example, burning of fossil fuel releases carbon dioxide while coal and oil mining releases methane in to atmosphere (Naylor, 2010). Both carbon dioxide and methane are green house gases and their increased concentration leads to global warming.......................................................................................


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