What caused the hole in the ozone layer?

Answer

The gaping hole in the ozone layer of the atmosphere over the Antarctic was caused primarily by high concentrations of ozone-depleting chemicals called CFCs. The vast hole in the ozone was discovered by scientists in the 1980s, who upon discovering the dramatic loss in ozone cover, set to work determining a primary cause. They found excessive concentrations of chlorofluorocarbons (CFCs) in the area of concern; CFCs were frequently used as additives in spray cans and refrigerants, but are now banned in most areas of the world.

CFCs are synthetic materials, meaning that they are produced by humans and do not naturally occur. Like most synthetics, they do not break down, or biodegrade, when introduced to land, water and soil. CFCs are light in weight and escape into the atmosphere upon release. Like friends at a party, these chemicals seek like particles out, and form tight clusters in the sky. According to the Union of Concerned Scientists, CFCs can remain in the atmosphere for decades, even up to a century, after their release, depending on the specific type. CFCs bind to ice particles during the winter, then make their way into the sky in the spring, when released from ice particles by ultraviolet light. Then, they set to work preventing surrounding molecular bonds from absorbing UV radiation.

Reference:
Q&A Related to "What caused the hole in the ozone layer?"
The ozone hole is a natural event that occurs when it is winter at a pole. UV-C is required to replace ozone that is decayed (naturally or otherwise) and in winter at a pole, it gets
http://wiki.answers.com/Q/What_caused_the_hole_in_...
Pollution caused the hole in the ozone layer, and the cause is linked back to things we use everday without thinking about the damage it is doing. Even something as simple as a can
http://www.ask.com/web-answers/Science/Nature/what...
Yes! The ozone hole is caused by the effect of pollutants in the atmosphere
http://www.chacha.com/question/what-caused-the-hol...
The CF-C's cause the hole by dispersing the ozone atoms and not allowing them to join together again.Thus the ozone molecule which has 3 atoms disperse in which 2 atoms become CO2
http://answers.yahoo.com/question/index?qid=200805...
Explore this Topic
There is a hole in the ozone layer because of chlorofluorocarbons that are eating away the ozone layer. These chlorofluorocarbons, also known as CFCs, are a family ...
There are numerous causes of ozone layer depletion, all of which are manmade compounds that enter the atmosphere. They include chlorofluorocarbons (CFCs), methyl ...
Ozone layer had undergone massive depletion due to natural and man-made causes. It had areas greatly decreased that made it to the point that there is already ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com