How does the increase of algae growth during eutrophication affect the water

An excess of supplements fundamentally nitrogen and phosphorus-in water begins a cycle called eutrophication. Green growth feed on the supplements, developing, spreading, and turning the water green. Green growth sprouts can smell unpleasant, block daylight, and even delivery poisons now and again.

hope this helps

heat a spark and oxygen

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.