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  • If we stop using ozone-depleting substances, then our ozo...
Multiple choice

If we stop using ozone-depleting substances, then our ozone layer should return to normal by:

  1. 2050

  2. 2100

  3. 2025

  4. NEVER.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

International scientific assessments project that the ozone layer will recover to 1980 levels by approximately 2050, assuming continued compliance with the Montreal Protocol.

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