Sound Directory - Largest Ozone Layer Hole Over Arctic Finally Heal Amid Lockdown https://www.sound-directory.com/story.php?title=largest-ozone-layer-hole-over-arctic-finally-heal-amid-lockdown The healing of the ozone layer is because of the polar vortex – the high-altitude current, which brings cold air into the polar areas. For more such latest information kindly visit at our site name newscafe247 and get the latest updates. Wed, 23 Sep 2020 05:29:55 UTC en <![CDATA[Comment #21]]> https://www.sound-directory.com/story.php?title=largest-ozone-layer-hole-over-arctic-finally-heal-amid-lockdown#c21 Wed, 23 Sep 2020 13:25:15 UTC pooja 0 21