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Leading researcher research Institute (AARI), Alex Ekaykin called anomaly of the ozone hole that appeared over the Arctic in March. According to him, such cases are quite rare.

the Ozone hole over the Arctic is rare that the hole was formed, certain conditions are necessary. You need to create a polar vortex that there was a very low temperature of about – 80 °C and polar stratospheric clouds, they’re mother of pearl. Over the Arctic, these conditions are rarely formed, — said Ekaykin.

Today in the world there is a positive trend of recovery of the ozone layer. Square hole over Antarctica has decreased significantly, reports the scientific journal N+1. The Montreal Protocol on substances that Deplete the ozone layer, signed September 16, 1987. It has been ratified by 190 countries.

Wrote NEWS.ru previously, scientists from NASA reported the ozone depletion over the Arctic.