RRB Group D Model Paper 8 with solutions

(1) Every year the World Ozone Day is celebrated on 16th September with a new theme to create awareness for the depletion of ozone layer. The Montreal Protocol is the only environmental treaty that enjoys ratification by 197 UN members. In 2017, 16th September was observed as the 23rd World Ozone Day under the theme ‘Caring for All Life Under the Sun’ and the 30th anniversary of the Montreal Protocol