Lapho ukhetha ama-rivets ensimbi engagqwali, ungahlulela kanjani ukuthi yiluphi uhlobo lwensimbi engagqwali okufanele lusetshenziswe?

1.201 insimbi engagqwali ifanele ukusetshenziswa endaweni eyomile futhi kulula ukugqwala uma kwenzeka amanzi.

2.304 insimbi engagqwali, ilungele indawo yangaphandle noma enomswakama, nokugqwala okuqinile nokumelana ne-asidi.

I-3.316 insimbi engagqwali, i-molybdenum ingeziwe, ukumelana nokugqwala okwengeziwe kanye nokumelana nokugqwala kwemigodi, kulungele ikakhulukazi amanzi olwandle noma amakhemikhali.