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പരിസ്ഥിതി പ്രശ്നങ്ങൾ
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ഓസോൺപാളിയുടെ നാശത്തിനുകാരണമാകുന്ന വാതകം ഏതാണ്?
A
CFC
B
BFC
C
HCFC
D
ഇവയെല്ലാം
Answer:
D. ഇവയെല്ലാം
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