| http://www.w3.org/ns/prov#value | - Human excretion contributes significantly to water polluting through providing organic matter and nutrients, such as nitrogen and phosphorus, which fosters the growth of algae, a decrease in the level of oxygen dissolved in the water, bad smells and other problems associated to eutrophication, Mu??oz says, although such effects are minimised by the purification processes performed before wastew
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