When domestic sewage mixes with river water
(a) small animals like rats will die after drinking
river water
(b) the increased microbial activity releases
micronutrients such as iron
(c) the increased microbial activity uses up
dissolved oxygen
(d) the river water is still suitable for drinking as
impurities are only about 0.1%.
(a) small animals like rats will die after drinking
river water
(b) the increased microbial activity releases
micronutrients such as iron
(c) the increased microbial activity uses up
dissolved oxygen
(d) the river water is still suitable for drinking as
impurities are only about 0.1%.