sentence: Our world is very polluted by public transport so we think about what will happen in the future . Public transport causes many problems in our environment , such as difficulty getting to the nearest destination , pollution , and disease .
modified: Our world is very polluted by public transport so we think about what will happen in the future .Public transport causes many problems in our environment such as , difficult reaching to the nearest destination , the pollution , and causing diseases .
transformation: ORTH, PUNCT, PUNCT, OTHER, VERB, DET, VERB, NOUN:NUM