My hometown used to be very beautiful .Many people did exercises and have a walk in both morning and evening .The river near my home was clear and fishes swam in it freely .But with the building of the riverside factories, the river was polluted and rubbish is everywhere on the river .Fishes were died, too .Machines roar all day long .The beautiful town disappeared. So we must protect our environment.(71字）不好意思还差两个字，LZ自己动下手吧。
