More and more people nowadays are living in mega-cities: cities with more than 20 million people. Is it positive or negative development?

Nowadays, countless people are living in mega-cites, cities with more than 20 million people. Personally, I believe mega-cities give the chance to improve life condition but, population increase, it brings several problems. One of the most positive side is living in mega-cities provided with many opportunities. Currently, numerous people desire to live in mega-cities because […]