state gov WBPSC Clerkship Mock Test 2023 - 24 General Knowledge Ecology and Environment Conservation efforts: India and World

বন সংরক্ষণের মাধ্যমে প্রতিরোধ ঘটে-

1
ভূমিক্ষয়
2
দূষণ
3
বন্যা
4
উপরের সবগুলি 
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