It is expected to take decades for the gases we have already released to leave the upper atmosphere. And third world countries are still making, using, and selling them. It will be a while before we know. Last year's (2008) ozone hole was not record sized, but it was very close to record sized.
Short Answer: The *hope* is that there will eventually be a significant decrease in UV-B transmitted through to Earth's surface, off the equator where most people live. CFC can (so far) only be permanently be removed by energetic UV, which is found in-and-above the ozone layer. Once we stop adding these (and similar) compounds to the atmosphere, they will eventually degrade and stop whatever contribution they are making to ozone depletion. One symptom of improvement should be a somewhat smaller ozone "hole" (on average), one that appears later, and one that "heals" sooner. Reduction in UV-B means fewer cataracts, less melanoma, fewer mutations, increased crop yields (all other things being equal), and gain of arable lands that may have been lost. If we hold our tongue just right...
In just a few months, a marked decrease in total column ozone would be observable, a marked increase in UV-B arriving at Earth's surface, later a marked increase in observable stress on plants and animals, and an increase in food shortages would be evident.
Banning the use of chlorofluorocarbons has begun to allow the ozone layer to recover. this improvement is predicted to continue.
Yes, chlorofluorocarbons have an adverse effect on the ozone layer. These react with ozone and decompose it to deplete the ozone layer.
Chlorofluorocarbons or CFC's are a vast effect on ozone layer. They chemically react with them to deplete them.
Chlorofluorocarbons damage the protective ozone layer.
No. Banning CFCs (chlorofluorocarbons) that powered some spray cans stopped the destruction of the ozone layer. The ozone layer, which protects us from dangerous UV radiation, is expected to recover by around 2050 if nothing else attacks it.
Humans are using CFC's is many things like AC's, deodorants etc. This is causing the depletion in the layer of ozone.
Yes, chlorofluorocarbons have an adverse effect on the ozone layer. These react with ozone and decompose it to deplete the ozone layer.
Banning the use of chlorofluorocarbons has begun to allow the ozone layer to recover. this improvement is predicted to continue.
Chlorofluorocarbons or CFC's are a vast effect on ozone layer. They chemically react with them to deplete them.
CFC's are man made chemicals. They react with ozone and deplete it.
Chlorofluorocarbons damage the protective ozone layer.
Some refrigerants have chlorofluorocarbons that are harmful to the ozone layer. The CFCs can lead to rapid depletion of the ozone layer in the atmosphere.
CFCs (chlorofluorocarbons) destroy the ozone layer allowing harmful radiation to reach the earth.
They are depleting the ozone layer. they react with ozone and deplete it.
CFCs (chlorofluorocarbons) destroy ozone in the ozone layer.
No. Banning CFCs (chlorofluorocarbons) that powered some spray cans stopped the destruction of the ozone layer. The ozone layer, which protects us from dangerous UV radiation, is expected to recover by around 2050 if nothing else attacks it.
Humans are using CFC's is many things like AC's, deodorants etc. This is causing the depletion in the layer of ozone.
The Chlorofluorocarbons are harming the ozone layer. They decompose into halogens which destroy ozone.