UN: Earth’s Ozone Layer Is Slowly Healing
A United Nations report finds Earth’s protective ozone layer is slowly healing itself.
Source : https://learningenglish.voanews.com/a/un-earth-s-ozone-layer-is-slowly-healing/6912611.html
A United Nations report finds Earth’s protective ozone layer is slowly healing itself.
Source : https://learningenglish.voanews.com/a/un-earth-s-ozone-layer-is-slowly-healing/6912611.html
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