Why ozone layer is it currently in danger?

Answer 1

Because mistakes of the past take a long time to go away. And some Man-made sources that accelerate ozone destruction have not been fully identified (say water vapor delivery to the upper atmosphere by commercial aircraft). The CFCs, and to a lesser extent the HCFCs, that we have produced since the early 1900s are still in the atmosphere. There are no natural cycles that will remove them, other than photoactivation in the ozone layer (and perhaps supercooling them to liquids at the poles).

Answer 2

There are still some CFCs being released from old refrigerators and car air conditioners. CFCs take seven years to reach the troposphere, where the ozone is, and chlorine radicals remain there, continually attacking ozone.

Scientists hope that the ozone layer will be restored by about 2050.

Answer 3

Ozone is an unusual type of oxygen molecule. Normally, there are higher concentrations of ozone at various altitudes in the stratosphere. Sometimes, under the right conditions, chemical reactions in the ozone layer can destroy most of the ozone, creating an ozone "hole".

Answer 4

Damage to the ozone layer is a rising concern. It is a concern because the depletion of the ozone causes increased amounts of UVB rays from the sun. This causes various types of skin cancers and evident damage on crops.

Answer 5

See "What is causing the depletion of the ozone layer?"

Answer 6

See "What makes scientists think the ozone layer is thinning?"

Answer 7

The ozone layer is at risk due to the continues use of CFCs. These CFCs react with ozone to decompose and deplete it.