sentence: Many people like travelling by car , but it pollutes a lot more than going by public transport . Public transport is cheaper than buying a car or motorbike , it also pollutes less than them .
modified: Many people like going by car , but it pollute a lot more than going by public transort.public transport is cheaper than buying a car or motorbike , it also contamiate less than these .
transformation: VERB, VERB:SVA, OTHER, VERB, PRON