The 1987 treaty to control ozone-depleting substances is the:
AParis Agreement
BMontreal Protocol
CKyoto Protocol
DRio Convention
Answer & Solution
Correct answer: B. Montreal Protocol
1. It was signed in Canada in 1987.
2. It came into effect in 1989.
3. It is the Montreal Protocol.
_Source: NCERT Class 12 Biology, Chapter 16, Environmental Issues._
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