engineering recuitment TNPSC AE Civil 2024 Test series Environmental Engineering Air and Noise Pollution
Consider the following statements related to ozone:
1. Tropospheric ozone is harmful
2. Stratospheric ozone is beneficial
3. During prevalence smog, O3 is formed
Which of the above statements are correct?1
1, 2 and 3
2
1 and 2 only
3
1 and 3 only
4
2 and 3 only