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Ozone depletion in the northern hemisphere is normal at this time of year because the lack of sunlight which replenishes it.

So nobody knows the implications of a dissapearing OZONE?

Even though there is a global agreement to ban CFC's, there are still parts of the world that are using them as this is all the technology they have. Then there is all kinds of other new products and techniques that are getting developed and used that has unknown repercussions on the ozone and other layers of the atmosphere.

From what I have seen over the years it does look like the ozone hole is still growing. The global ban on CFC's did have some impact and has reduced the expansion, but there is a lot more going on.

The simple answer is human development with the ozone layer just one of many interactions of climate change. For the complex answer you need to start taking samples of just what exactly is happening in this region.

i remember years ago there was regular talk about the ozone. no one mentions it anymore. it's obviously not good that there is a hole in it. i don't know why you don't hear about it now.

This is not new thing for me. Ozone hole was bigger than usually last summer because we had one of coldest winters in long time. Cold winter depleted ozone and like Phage says, Sun radiation forms ozone, but during winter months there is less sun radiation..

Some parts of northern hemisphere had very large ozone layers, like Siberia. UV index was crazy there.

North Ozone Hole now moved above Netherlands, N. Germany , Denmark and parts of UK:



I do not believe that 24 % drop is significant, however still worth mentioning it I guess.