22 Templates for ielts writing: Fast Track to Success in the ielts writing Test

are complicated
. 
Firstly
, the large population in cities
has led to housing shortage. 
For instance
, in many big cities, a large number of people have to
live in suburbs because the rent is too high in the city. 
As a result
, these people must commute
to the city to work every day, 
which leads to the second problem – 
traffic congestion.
Indeed,
traffic jam has become a major concern in so many cities around the world. 
Take
Shanghai 
as an example
. If someone wants to drive from the eastern side to the western side
in Shanghai, they may spend six or seven hours on the road because of traffic congestion. 
The
third problem is
pollution. 
It seems that
air pollution and water pollution are more severe in
cities than in rural areas, 
and research has proved that
overcrowded cities suffer from these
issues even more because of the large population.