sentence: Besides , it 's also an environmental problem ; exhaust fumes engulf the earth . The more the car is used , the more exhaust gases are released . We are killing our mother earth .
modified: Besides , it 's also an environment problem , exhaust fumes engulfed the earth , more car is used , more exhaust gas release , we are killing our mother .
transformation: MORPH, PUNCT, VERB:TENSE, OTHER, DET, DET, OTHER, VERB:FORM, PUNCT, NOUN