Multiple choice

Montreal protocol was signed at Montreal (Canada) in 1987 to controll the emission of

  1. green house gases

  2. acid rain causing substances

  3. ozone depleting substances

  4. polar ice cap melting substances

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

Montreal protocol was signed at Montreal (Canada) in 1987 to controll the emission of ozone depleting substances.