Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Knowledge Ecology and Environment Environmental pollution
In which year, the Central Pollution Control Board initiated its own National Ambient Air Quality Monitoring (NAAQM) program?
1
1985
2
1997
3
1993
4
1960
5
None of the above