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A huge hole in the ozone layer over the Arctic is set to grow even larger this spring as a blast of cold weather combines with returning sunshine and lingering air pollutants.

The hole over the Canadian Arctic is already thought to be around 770,000 square miles (two million square kilometres) or around the size of Greenland.

But environmental scientists are predicting the gap in the Earth’s protective atmospheric layer could grow even larger this spring when the sunshine returns to the region after the long, dark winter. (Source)