What's Going on with the Hole in the Ozone Layer? We Asked a NASA Expert

What's going on with the hole in the ozone layer?

Thanks to a global effort to regulate ozone-depleting substances, the ozone hole is showing signs of recovery and is projected to return to a healthy level by mid-century.

However, at NASA, scientists continue to monitor its progress. @NASAGoddard's Qing Liang explains more.

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