sentence: It is true that cars pollute the atmosphere , but it is also true that the emissions from public transport also contribute to pollution - some would say even more than private transport , as Diesel motors are much dirtier and more inefficient than smaller , petrol driven motors like those of private cars .
modified: It is true that cars pollute the atmosphere , but it is also true that the emissions from public transport also contribute to pollution - some would say that even more than private transport , as Diesel motors are particularly dirtier and more inefficient than smaller , petrol driven motors like those of private cars .
transformation: PREP, ADV