There is no dought petrol mostly uses in the car industry and some people the cost of petrol can resolve contamination and increasing traffic. I'm afraid I have to disagree with this statement because there are many other ways to solve this issue.
Obviously, these days any middle-class people can buy cars. But if the price for the fuel goes up, it reflects in their budget. A not only budget of these families will be changing, but the prices of the goods rise in this circumstance because the net cost for the transportation will be going up. Maybe rising prices can bring more economic advantages to a country by tax, but taxes also will be collected from people of the country.
Another point to consider is instead of using fossil fuel and polluting our air with Carbon dioxide. We can use alternative energy sources like wind and sunlight energy and use it for cars because significant work has been done in electric cars. The only problem is that electric cars are expensive for the middle-class, but the car industry companies doing more investigations and competition between them will lead to good results. If scientists do more researches in this area, the human can leave for generation better future.
In conclusion, although modern humanity faces various problems, such as global warming and nature pollution, these problems are not insurmountable. In my view, it is not only one government's, but it is also all humanity responsibility to tackle these issues, and they should begin now by considering some of the solutions proposed above. 
There is  
no dought
 petrol  
mostly
  uses
 in the  
car
 industry and  
some
  people
 the cost of petrol can resolve contamination and increasing traffic. I'm afraid I  
have to
 disagree with this statement  
because
 there are  
many
 other ways to solve this issue. 
Obviously
, these days any middle- 
class
  people
 can  
buy
  cars
.  
But
 if the price for the fuel goes up, it reflects in their budget. A not  
only
 budget of these families will be changing,  
but
 the prices of the  
goods
 rise in this circumstance  
because
 the net cost for the transportation will be going up. Maybe rising prices can bring more economic advantages to a country by tax,  
but
 taxes  
also
 will  
be collected
 from  
people
 of the country.
Another point to consider is  
instead
 of using fossil fuel and polluting our air with Carbon dioxide. We can  
use
 alternative energy sources like wind and sunlight energy and  
use
 it for  
cars
  because
 significant work has  
been done
 in electric  
cars
. The  
only
 problem is that electric  
cars
 are expensive for the middle- 
class
,  
but
 the  
car
 industry  
companies
 doing more investigations and competition between them will lead to  
good
 results. If scientists do more researches in this area, the human can  
leave
 for generation better future. 
In conclusion
, although modern humanity faces various problems, such as global warming and nature pollution, these problems are not insurmountable. In my view, it is not  
only
 one  
government
's,  
but
 it is  
also
 all humanity responsibility to tackle these issues, and they should  
begin
  now
 by considering  
some of the
 solutions proposed above.