Kwihuta byihuse no gukora neza;
Kuzigama no kubika umwanya;
Consumption Gukoresha ingufu nke mu musaruro, kuzigama umutungo;
★ Guhindura neza cyane nibintu byiza byumubiri nubukanishi;
Process Inzira nziza ihamye;
Guhuza n'imihindagurikire y'ibikoresho byo ku rukuta;
Forms Imiterere itandukanye yuburyo irashobora gukorwa;