Geneva. April 5. INTERFAX.RU — thickness of the ozone layer over the Arctic has decreased to a record level due to chemicals in the atmosphere, according to a report by the World Meteorological Organization, the United Nations.
It is reported that the amount of ozone in the Arctic with the onset of winter has decreased by 40%, while in winter 2010 it was down to 30%. According to scientists, the main cause of ozone depletion in 2011 was the action of chemicals and an unusually cold winter.
However, experts predict that by 2030, the level of ozone can be restored to the level in 1987, as 196 countries signed the Montreal Protocol to withdraw from the production of chemicals that deplete the ozone layer.