The Arctic's ozone layer developed a tear, which grew into a hole, and then a bigger hole. Now, it may be biggest hole the North Pole's ozone layer has ever incurred.
원문출처 : https://www.cnn.com/2020/04/15/world/biggest-arctic-ozone-hole-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/04/15/world/biggest-arctic-ozone-hole-scn-trnd/index.html