Hello Everyone, I hope you have a nice day!
Have you ever heard about the news saying that we’re all going to die in the next 200 years if we can’t stop global warming! Is this news too exaggerated or it speaks the truth? Let’s find it out.
Today’s weather conditions which change considerably from the weather in the past come in for a lot of criticism and argument about the causes and its impacts on environments. People around the world consider this issue vital because they realize that it does not have an impact on only human beings, but also all lives on earth.
What is Global Warming? How does it happen?
Global warming is the phenomenon which the average surface temperatures above land and ocean increase. It is believed that this terrifying situation mostly results from a large amount of greenhouse gases, such as Carbon dioxide released from factories and vehicles, including Chlorofluorocarbon (CFC) which is used to be refrigerants in air-conditioners, refrigerators, and used as aerosol-spray propellants, solvents, and foam-blowing agents. These substances will gradually float and accumulate themselves in the atmosphere. As a result, it causes Greenhouse Effect which prevents the heat from the sun from going out through the atmosphere.
“The map illustrates just how much warmer temperatures were in the decade (2000-2009) compared to average temperatures recorded between 1951 and 1980 (a common reference period for climate studies). The most extreme warming, shown in red, was in the Arctic. Very few areas saw cooler than average temperatures, shown in blue. Gray areas over parts of the Southern Ocean are places where temperatures were not recorded. The analysis, conducted by the Goddard Institute for Space Studies (GISS) in New York City, is based on temperatures recorded at meteorological (weather) stations around the world and satellite data over the oceans.” NASA Earth Observatory Image of the Day: 2009 Ends Warmest Decade on Record http://earthobservatory.nasa.gov/IOTD/view.php?id=42392
And what is Greenhouse?
“A greenhouse is a house made of glass. It has glass walls and a glass roof. People grow tomatoes and flowers and other plants in them. A greenhouse stays warm inside, even during winter. Sunlight shines in and warms the plants and air inside. But the heat is trapped by the glass and can't escape. So during the daylight hours, it gets warmer and warmer inside a greenhouse, and stays pretty warm at night too.  |
| http://www.small-greenhouses.com/small-greenhouses/small-greenhouses-easygrow-greenhouse/ |
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| http://newfarm.osu.edu/crops/greenhouse.html |
Earth's atmosphere does the same thing as the greenhouse. Gases in the atmosphere such as carbon dioxide do what the roof of a greenhouse does. During the day, the Sun shines through the atmosphere. Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing the heat back into the air. But some of the heat is trapped by the greenhouse gases in the atmosphere. That's what keeps our Earth a warm and cozy 59 degrees Fahrenheit, on average.
If the greenhouse effect is too strong, Earth gets warmer and warmer. This is what is happening now. Too much carbon dioxide and other greenhouse gases in the air are making the greenhouse effect stronger.”
Reference: the Earth Science Communications Team_NASA's Jet Propulsion Laboratory/California Institute of Technology, 2010. What is a greenhouse http://climate.nasa.gov/kids/bigQuestions/greenhouseEffect/#bg2.
Therefore, the world cannot release the heat from the sun to the space as it did. This is why the average Earth’s surface temperature rises. Although the average temperature does not increase much in the past century (around 2.0-4.5 degrees Celsius in the past century), it has been changing the globe’s weather conditions and has an adverse impact on all lives. This phenomenon is called ‘Climate Change’.
Oh,CFC is so harmful.
ReplyDeleteYes! It's dangerous to the atmosphere!
ReplyDeleteYou'll see in the next few blogs how it stimulates global warming.