_______ is the theme of the 2021 World Ozone Day?
A) Keep Cool and Carry on: The Montreal Protocol
B) Ozone for life: 35 years of ozone layer protection
C) Montreal Protocol – keeping us, our food and vaccines cool
D) 32 years and Healing
Explanation: Theme for 2021 World Ozone Day: ‘Montreal Protocol – keeping us, our food and vaccines cool.’