Photo taken on Nov. 8, 2015 shows smog-shrouded downtown Shenyang, northeast China's Liaoning Province. Serious air pollution shrouded 14 cities in Northeast China's Liaoning Province on Sunday, with provincial capital Shenyang witnessing a peak reading of the concentration of PM2.5 - airborne particles measuring less than 2.5 microns in diameter - of 1,017 micrograms per cubic meter. (Photo: China News Service/Zhang Yao)
