Narkar da iskar oxygen tana nufin adadin iskar oxygen da aka narkar a cikin ruwa, yawanci ana rubuta shi azaman DO, wanda aka bayyana a cikin milligrams na oxygen kowace lita na ruwa (a cikin mg/L ko ppm).Wasu mahadi na kwayoyin halitta sun lalace a ƙarƙashin aikin ƙwayoyin cuta na aerobic, waɗanda ke cinye narkar da iskar oxygen a cikin ruwa, kuma ...
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