Mu myaka ya vuba aha, ubwo igitutu ku micungire y’umutungo w’amazi gikomeje kwiyongera ku isi, ibisubizo by’amazi meza n’ikoranabuhanga ryo kugenzura ibidukikije byinjiye mu cyiciro cy’iterambere ryihuse. Mu buhinzi bw’amafi, kuhira imyaka mu buhinzi, gutunganya amazi yanduye mu nganda, no gucunga imigezi mu mijyi, ...