Many people are moving from cities to the suburbs. Big cities are often noisy and crowded. A suburb is usually quiet and friendly. The houses in the countries are bigger with bigger yards. Nowadays people prefer countries to live. The cities are getting expensive to live.
It is dustier in cities than countries. There are lots of factories in cities which makes the weather dirty. In the past years many people moved to cities from countries, this caused an increase in the number of people in cities and cities are getting so crowded.