The 2008 ozone hole – a thinning in the ozone layer over Antarctica – is larger both in size and ozone loss than 2007 but is not as large as 2006.
Ozone is a protective atmospheric layer found in about 25 kilometres altitude that acts as a sunlight filter shielding life on Earth from harmful ultraviolet rays, which can increase the risk of skin cancer and cataracts and harm marine life. This year the area of the thinned ozone layer over the South Pole reached about 27 million square kilometres, compared to 25 million square kilometres in 2007 and a record ozone hole extension of 29 million square kilometres in 2006, which is about the size of the North American continent.
The depletion of ozone is caused by low temperatures and the presence of ozone-destructing gases in the atmosphere like chlorine and bromine.
In my own opinion we can help to stop increase of ozon hole. Desodorans with freon promote it. We can use desodorans and cosmetics without this gas. It is very harmful to our planet. I think it is not big renunciation for Earth. We must care about place we live. Now, we don't think about "not import_ant" things like it, but effect of ozon hole like for example greenhouse effect can become very seriuos problem for humanity. The greenhouse effect is import_ant. Without the greenhouse effect, the Earth would not be warm enough for humans to live. But if the greenhouse effect becomes stronger, it could make the Earth warmer than usual. People in my age usual don't think about ecologic problems like ozone hole, but campaigns can show them how important are them.