When I was very small, I stayed in the hometown with my grandparents. I had the great time there, I liked the environment so much. There was a long river in front of my house, the water was very clean, I could see the small fish swim. My grandma usually washed her clothes along the river side. But now when I went back to my hometown, the river was very dirty, the water was light yellow and there were so many rubbish floating in the river. It ma
