Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Ecology and Environment Environmental pollution
What does the pollution in simple terms means
1
uncontaminated environment
2
contaminated environment
3
uncontaminated and contaminated environment
4
More than one of the above
5
None of the above