(a) 44 Years and Healing
(b) 32 Years and Healing
(c) 50 Years and Healing
(d) 48 Years and Healing
Exp:
The International Day for the Preservation of the Ozone Layer is observed every year on 16th of September to commemorate the date of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987. The 2019 theme ‘32 Years and Healing’ celebrated over 3 decades of remarkable international cooperation to protect the ozone layer and the climate under the Montreal Protocol. It reminds us that we must keep up the momentum to ensure healthy people and a healthy planet.