താഴെ പറയുന്നവയിൽ ഏതാണ് ഒരു ജൈവ മലിനീകരണം?
Aപ്ലാസ്റ്റിക് മാലിന്യം
Bകീടനാശിനികൾ
Cറേഡിയോആക്ടീവ് മാലിന്യം
Dഅഴുക്കുചാൽ മാലിന്യം
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