Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Knowledge Ecology and Environment
Which of the following anthropological practices produces the worst organic water pollution?
1
Humans bathing in the water
2
Intensive livestock farming
3
Recreational boating
4
More than one of the above
5
None of the above