Massive hole in ozone layer over Arctic now closed: UN

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Ozone depletion over the Arctic hit a record level in March, the biggest since 2011, but the hole has now closed, the UN World Meteorological Organization (WMO) said on Friday.

The springtime phenomenon in the northern hemisphere was driven by ozone-depleting substances still in the atmosphere and a very cold winter in the stratosphere, WMO spokeswoman Clare Nullis told a UN briefing in Geneva.

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“These two factors combined to give a very high level of depletion which was worse than we saw in 2011. It’s now back to normal again … the ozone hole has closed,” she said.

Asked whether less pollution during the pandemic had played a role, Nullis said: “It was completely unrelated to COVID.”

(With agency inputs)

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