state gov TSPSC Group 2 (తెలంగాణ గ్రూప్ 2) Mock Test Series General Science Biology Ecology & Environment
Ozone layer protects earth from ultraviolet rays, Which of the following harms the ozone layer?
1
Burning of wood for cooking
2
CO2 used in soda water bottle
3
Urea used as fertiliser
4
Chloro Fluoro Carbon used in Air-Conditioners