My home town used to be a small but beautiful place.There were a lot of trees and flowers.We lived on farming fishing and planting.There were also a lot of fish in the river which was behind our town.Our house was small and poor at that time.Although we are at that time,we were happy with that situation. But now the smalltown disappeared,instead there was a new and beautiful city.A lot of tall buildings and many factories are standing there.Cars running on the street,making a iot of noise.As there are more and more factories,the air quality is lowing,there are less trees on the street and less fish in the river. So we must change the situation.We must protect the environment and protect the earth.