ওজোন স্তরের ফাটলের জন্য মুখ্যত দায়ী কোন গ্যাস?

MCQ Practice Physics

ওজোন স্তরের ফাটলের জন্য মুখ্যত দায়ী কোন গ্যাস?

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BCS 19th Preliminary Question Bank Quiz and Solution All Subject 1998 Question 37 BCS 19th Preliminary Question Bank Quiz and Solution All Subject 1998 Question 37 BCS 19th Preliminary Question Bank Quiz and Solution All Subject 1998 Question 37 BCS 19th Preliminary Question Bank Quiz and Solution All Subject 1998 Question 37