If an object has a mass of 580g what does it weigh

Always convert first to kg

So 580 g is 0.58 kg

Now it depends on which planet you are on, to what gravity the planet has. Lets go with Earth so 10N

0.58 x 10= 5.8

Ans) 5.8 N/kg

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.