Wang Yumei, a resident of Nanxiawen village in Taiyuan city, cooks with a natural gas stove, Oct 18. Taiyuan in Shanxi province, one of the regions dependent on coal mining, will bid farewell to burning coal this winter as the city has been making a gradual switch from coal to gas since 2012. More local residents now use electricity and clean sources of energy for their heating. [Photo/Xinhua]

Ren Lisheng, a resident of Chiqiao village in Taiyuan, sits beside a radiator at home, Oct 11. [Photo/Xinhua]