Which is not a major factor resulting in pollution from increased economic activity in china? a) more people are driving motor vehicles b) more factories are burning coal c) more farmlands are being cleared d) more bicycles are being used for traveling purposes

People driving motor vehicles, factories burning coal, and farmlands being cleared are all factors that result in pollution. The only one that does not is more bicycles being used for traveling purposes. 

The answer is d) more bicycles are being used for traveling purposes.