Niki kumena imizunguruko, guhinduranya imitwaro no guhagarika? Birashoboka ko abakozi benshi b'amashanyarazi basobanutse neza. Ariko iyo bigeze kubitandukaniro no kubishyira mubikorwa hagati yamashanyarazi, guhinduranya imizigo no guhagarika, abakozi benshi b amashanyarazi barashobora kumenya umwe gusa ariko ntabandi, kandi kubatangiye amashanyarazi, ntibazi icyo babaza. Twese tuzi ko icyuma cyumuzunguruko gishobora gufunga, gutwara no kumena umuyaga mubihe bisanzwe byumuzunguruko, kandi birashobora gufunga, gutwara no kumena umuyaga mubihe bidasanzwe byumuzunguruko (harimo nigihe gito cyumuzunguruko) mugihe cyagenwe.