-Akara mmanụ, ọgwụ, nri, ihe ọṅụṅụ, mmanya, pesticides, agro-chemical, na ịchọ mma.-Mmiri anaghị egbochi mmiri, mmiri anaghị egbochi mmiri.-Acid, mgbochi alkali, mgbochi corrosion.- Dabara na ọkọlọtọ nri FAD.–Enwere mbipụta ahaziri ahazi.Anyị nwere ahụmahụ bara ụba i...
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