Some people believe that increasing the price of petrol is the best way to solve growing traffic and pollution problem. I believe that this idea will bring certain changes to some extent but it is the obvious solution for the above problems.
i think, you need conjunction or connector between these sentences, so this will be more interesting and easier to understand
First of all, it is important to find the root cause of the growing traffic and pollution problems, to solve it.
actually, I'm confuse with this sentence
One of the root cause for this is increasing numbers of private vehicles.one of the root cause
what does it mean?
this is same as this phrase, one of students here,,,
so, if you put 'one of' then, you should put noun plural
Besides this, government should discourage the use of old vehicles lets say 20 years old vehicles as they emit more pollutant than new ones.
if you want to use 'besides' you should directly put a comma after that, different than 'beside' when you put 'beside' you could put a noun/nouns after that