Ingabe ukudla okungokwemvelo kunempilo?
Ukuthi ukudla kungokwemvelo noma cha akukushintshi ukubaluleka kokudla okunjalo. Umqondo wokuthi ukudla okungokwemvelo kunempilo kunokudla okungekhona okungokwemvelo ungasekelwa umqondo wokuthi amakhemikhali noma imithi yokubulala izinambuzane engase itholakale ekudleni okungekhona okungokwemvelo iyingozi futhi ngenxa yalokho ayisiyo enempilo.