A farmer is concerned about the growth of the crops because their water supplies are running low. The farmer is worried about the evaporation of excess water and wants to ensure their crops are getting enough water to grow.
The farmer is prepared to meet any cost if it means long-term success.

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.