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harina [27]
4 years ago
10

What things positively effect the health and quality of a river

Biology
1 answer:
Vladimir [108]4 years ago
7 0
Amount of plant life and bacteria - plants take up harmful nitrates that can poison river life and turn them into harmless nitrogen gas. Bacteria work to filter the water. Having the perfect food chain balance helps a river ecosystem as well (such as not too many big fish per small fish)
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