英语翻译欢迎回来,听说你回了一趟老家,据我所知,你已经很多年没有回去了,快来说说你的家乡发生了哪些变化?我认为我的家乡变

Welcome back! I heard you went back to hometown. As far as I know you haven't been back for many years. what changes have taken place in your hometown?
I think changes in my hometown is really great. For exsample,it is full of fragrance of flowers and plants ten years ago. while it's dusty everywhere with none trees now.
I am so sorry to hear this news, It seams that environmental problems in your home town has become a big problem. What is the most serious environmental problem do you think ?
I think ti is air pollution, there is heavy fog every morning. People are wearing masks and low their heads through the way which visibility less than 5 m. Also, sandstorm is frequent.
What do you think is the root cause forso serious problem of air pollution.