Multiple choice

Nations signed the Montreal Protocol in 1987 on

  1. Substances that deplete the ozone layer

  2. Gases that cause global warming

  3. Both (a) and (b)

  4. Neither (a) nor (b)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Montreal Protocol on Substances that Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion.

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