Chlorofluorocarbons (CFCs) and the chlorine that they release are causing the damage to the ozone layer, and the extreme thinning at the poles that are called "holes".
Ozone is a protective layer in the upper atmosphere. It is formed, when oxygen molecules absorb short wavelength ultra violet radiations from the sun. Ozone is mostly destroyed by free radicals in the atmosphere.
When compounds like CFCs (chlorofluorocarbons) and other halocarbons are released, they are dissociated by sunlight into chloride radicals. These radicals attack ozone, thereby decreasing its concentration. This results in a thinning of the ozone layer, and in polar regions, a hole.
The holes occur at the poles, and usually in Antarctica because of the extreme cold. During the winter polar stratospheric clouds form which are able to convert gases in the atmosphere into Cl (chlorine) and ClO (chlorine monoxide). When the sun arrives at the end of winter, that is the trigger to begin. This is why the hole is largest in spring.
Ozone depleting substances cause damage to the ozone layer. CFC's are greatest of them.
CFC's are causing damage to ozone layer. They react with ozone to deplete it.
CFC's cause damage to ozone layer. They react with ozone to deplete it.
Many refrigerants cause damage to the ozone layer. These are CFC's.
The damage in the ozone layer reminds us that our actions as humans have consequences.
Ozone depleting substances cause damage to the ozone layer. CFC's are greatest of them.
There are many ozone depleting substances. These substances are the ones that can cause damage to the ozone layer.
damage to ozone layer is called ozone depletion. It is thinning of ozone layer.
CFC's are causing damage to ozone layer. They react with ozone to deplete it.
CFC's cause damage to ozone layer. They react with ozone to deplete it.
The ozone does not create any damage. It is a layer of protection.
Many refrigerants cause damage to the ozone layer. These are CFC's.
CFC's are leading substance in ozone depletion. They decompose ozone.
The damage in the ozone layer reminds us that our actions as humans have consequences.
ozone layer disappears due to man made chemicals. These are CFC's that damage the ozone layer.
The CFC's by humans damage the ozone layer. They react with ozone to deplete it.
CFC's damage the ozone. They react with ozone to deplete it.