Multiple choice

Montreal Protocol is popularly considered the most successful UN environmental treaty. How many countries signed it?

  1. 179

  2. 197

  3. 719

  4. 917
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Montreal Protocol is a landmark environmental agreement that has achieved universal ratification, with 197 parties (countries) having signed it to protect the ozone layer.

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