Europe Ecologie promised ozone layer in the Arctic spring 2011 record thinning, reports ScienceNews. According to the researchers, in just a month rather large region (15 million square kilometers) in the vicinity of the North Pole has lost almost half of ozone. Thus, at present the number of ozone there is 306 Dobson units (units of the ozone layer) with normal to 430-380 units.
According to scientists, this low concentration of ozone is caused by the low temperature of the stratosphere. As one of the reasons for this is called a large amount of greenhouse gases that trap heat
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