30. 第三十篇 SMOG IN BEIJING-朗读音频-英音

PASSAGE 30: SMOG IN BEIJING

Earlier this week, a thick layer of smog rolled into China’s capital city, turning skyscrapers into shadows and clear air into a yellow fog.

 Why does smog keep blanketing Beijing? Smog in China has many causes, including pollution from industries and traffic, but it tends to happen more often in the winter, when plummeting temperatures cause electricity demand to soar, and coal-fired power plants send more tiny particles of dust into the air.