Civil Services Uttar Pradesh (उत्तर प्रदेश) PCS Mock Test Series 2025 General Knowledge Ecology and Environment Environmental pollution
Which of the following statements is/are true?
1. Industrial use of CFCs have damaged the ozone layer
2. The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of Gridson units (GU).
1
Both 1 and 2
2
Neither 1 nor 2
3
Only 2
4
Only 1