Into which group would you place a unicellular organism that has 70S ribosomes and a peptidoglycan cell wal

i think that you are smart and you should fit for it out

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.