NASA: Ozone layer hole shrunk by 20%

The hole in Earth’s ozone layer has shrunk by 20%, as a result of a global ban on harmful chemicals, according to a NASA study quoted by Euronews. In a report published this week, scientists show that the hole’s reduction occurred during the winter months between 2005 and 2016.

ozone layer hole

Antarctic ozone hole (credit: NASA)

“We see very clearly that the level of chlorofluorocarbons in the ozone hole is decreasing with ozone depletion becoming lower,” said Susan Strahan of NASA’s Goddard Space Flight Center.

The study, based on information provided by satellite Aura, is the first to directly analyze chemical levels, and claims that the reduction of the hole in the ozone layer over Antarctica is the result of the ban on chlorofluorocarbons.

The ozone layer protects the Earth from Sun’s ultraviolet radiation, which can cause skin cancer, cataracts and can destroy the plants.

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Chlorofluorocarbons, which were widely used in fridges and aerosol cans, exhibit a lifetime spanning between 50 and 100 years, therefore the hole in the ozone layer is expected to close in 2060 or 2080.

Ozone layer hole over Antarctica is closing

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