engineering recuitment PPSC JE Civil Mock Test 2022 General Knowledge Ecology and Environment Environment Problems

জীবাশ্ম জ্বালানীর জ্বলনের ফলে উৎপাদিত গ্রিনহাউস গ্যাস কোনটি? 

1
CO2
2
CH4
3
O3
4
N2O
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