The second stage of bioremediation involves a plant known as Vetiveria zizanioides, a perennial grass species.. 
Ọ̀kan nínú àwọn ALÁBỌ́de elerùn àkọ́kọ́ fún ìdá àlàyé deede, ní a lò lọ láti ṣe àgbékalẹ̀ àwọn ètò fún kíkọ àti Ìdàgbà àwọn ní tuntun.. 