Ozone layer hole's shrunk & may slowly recover: "if we didn’t back off with these chemicals, we’d have a crisis" https://www.theguardian.com/environment/2016/jun/30/ozone-layer-hole-appears-to-be-healing-scientists-say …
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Ozone layer hole's shrunk & may slowly recover: "if we didn’t back off with these chemicals, we’d have a crisis" https://www.theguardian.com/environment/2016/jun/30/ozone-layer-hole-appears-to-be-healing-scientists-say …