1. Amavu n'amavuko Vietnam, ikigo cy'ingenzi mu buhinzi n'inganda mu majyepfo y'uburasirazuba bwa Aziya, ihura n'ibibazo bikomeye byo kwandura amazi, cyane cyane ubwandu bw'ibimera (COD) n'ibintu bidafite amazi (urubura) mu migezi, ibiyaga n'uturere two ku nkombe. Gukurikirana ubuziranenge bw'amazi gakondo bishingiye ku gupima ingero za laboratwari, ...
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