I am now living in Taiyuan, one of the most seriously polluted cities in the world. How I regret that I live in this city! Every day we breathe in the polluted air.You know it is dangerous to I am now living in Taiyuan, one of the most seriously polluted cities in the world. How I regret that I live in this city! Every day we breathe in the polluted air. You know it is dangerous to