Owing to increased number of cars, road traffic has become an international problem. It has multiple causes and has resulted in a surge of air pollution. There are several ways to control it like improving public transport.
The ever increasing figure of vehicles on roads has been responsible for the traffic problems. The reason behind this may be easy affordability by the general public. The leasing of cars by several banks and easy instalments' have convinced people to purchase the cars. Previously, they could not afford to but these vehicles as they could not make full payment. Now a small amount is deducted from the salary and a lot of low income group manages to own their personal cars. The working couples may be another reason for the increase transport congestion. Previously, there used to be a single family car which was owned by family head or father and everyone used to use it but now with the increase in working couples both of them need their own cars to go to the office.
The traffic congestion is responsible for ever increasing air pollution. The exhaust from cars produces carbon dioxide and from old car's carbon monoxide, which is responsible for global warming. This has become an emergency throughout the world as the release of a large amount of greenhouse gases has resulted in damage to ozone layer which protects us against the ultraviolet radiations which are harmful. These gases have resulted in acid rain in certain areas of the earth, hence destroying the forests and trees.
The transport congestion can be controlled in several ways, but the most important is improving public transport. If the government introduces and improves the public transport like metro, trams and make them available to the general public, people would use these rather than cars. The reduction in number of cars on roads would mean reduced emission of harmful gases and consequently decreased air pollution. Another solution might be a restriction on the number of cars that a family can own. For instance, nowadays everyone in the family, owns his own vehicle, but a minimum number should be implemented to reduce the tendency of purchasing cars.
In conclusion, road traffic contributing to air pollution is burning issue in todays world and the world powers should join hands in collaboration in order to have an effective control on it. 
Owing to increased  
number
 of  
cars
,  
road
  traffic
 has become an international problem. It has multiple causes and has resulted in a surge of  
air
  pollution
. There are several ways to control it like improving  
public
 transport.
The  
ever increasing
 figure of vehicles on  
roads
 has been responsible for the  
traffic
 problems. The reason behind this may be easy affordability by the general  
public
.  
The
 leasing of  
cars
 by several banks and easy  
instalments
' have convinced  
people
 to  
purchase
 the  
cars
. Previously, they could not afford to  
but
 these vehicles as they could not  
make
 full payment.  
Now
 a  
small
 amount  
is deducted
 from the salary and  
a lot of
 low income group manages to  
own
 their personal  
cars
. The working couples may be another reason for the increase  
transport
 congestion. Previously, there  
used
 to be a single  
family
  car
 which was  
owned
 by  
family
 head or father and everyone  
used
 to  
use
 it  
but
  now
 with the increase in working couples both of them need their  
own
  cars
 to go to the office.
The  
traffic
 congestion is responsible for  
ever increasing
  air
  pollution
. The exhaust from  
cars
 produces carbon dioxide and from  
old
 car's carbon monoxide, which is responsible for global warming. This has become an emergency throughout the world as the release of a large amount of greenhouse gases has resulted in damage to ozone layer which protects us against the ultraviolet radiations which are harmful. These gases have resulted in acid rain in certain areas of the earth,  
hence
 destroying the forests and trees.
The  
transport
 congestion can  
be controlled
 in several ways,  
but
 the most  
important
 is improving  
public
  transport
. If the  
government
 introduces and  
improves
 the  
public
  transport
 like metro, trams and  
make
 them available to the general  
public
,  
people
 would  
use
 these  
rather
 than  
cars
. The reduction in  
number
 of  
cars
 on  
roads
 would mean  
reduced
 emission of harmful gases and  
consequently
 decreased  
air
  pollution
. Another solution might be a restriction on the  
number
 of  
cars
 that a  
family
 can  
own
.  
For instance
, nowadays everyone in the  
family
,  
owns
 his  
own
 vehicle,  
but
 a minimum  
number
 should  
be implemented
 to  
reduce
 the tendency of purchasing cars. 
In conclusion
,  
road
  traffic
 contributing to  
air
  pollution
 is burning issue in  
todays
 world and the world powers should  
join
 hands in collaboration in order to have an effective control on it.