The city is much healthier than the city of mofussil than the city .... What is the reason?

● Large cities have been built long ago. Since then, it was not possible to construct a planned city properly. Because of the crushing of colonial rule, the power of the country was defeated by exile because of the crushing of the rule. As a result, without considering the long-term benefits, the houses have been built, hospitals, offices, schools, colleges and roads. And during the construction time, due to the lack of proper management of the drain, the city will be seen in a little rain today! (Insha Allah will continue)