One major causes of Global Warming is Ozone Sprays. The hydro-chlorofluorocarbons (HCFCs) were developed to replace CFCs. These gases can still damage ozone if they reach the stratosphere, but they are less likely to since their extra hydrogen atom allows them to be destroyed in the lower layers of the atmosphere. These gases are also controlled under the Montreal Protocol and were phased out after 2004. The gases that replaced both the CFCs and HCFCs are hydro-fluorocarbons (HFCs), which do not contain any chlorine atoms and so have no ozone depleting effect. Unfortunately, many of them are powerful greenhouse gases and could contribute to global warming if emitted in large quantities.
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Microsoft ® Encarta ® Premium Suite 2005. © 1993-2004 Microsoft Corporation. All rights reserved.
2 comments:
I don't know the meaning of ozone spray that contains these gases? so can you give me an example please
There are numerous examples such as pesticides that are affected by the smoke and the ozone hole. And another example is the use of perfumes.
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