They are longing for city life.
People whose homes are in the town want to live in the country.
Country life is healthier than city life.
It is difficult to find a happy medium between city and countryside.
Beware of thefts in a big city.
Air is polluted in cities.
Our cities create serious pollution problems.
I've finally got used to urban life.
Nowadays more and more people prefer country life to city life.
More and more people are moving to urban areas.