Photo taken in CBD of Beijing, China, Nov. 13, 2015. Beijing government issued a yellow signal warning against heavy pollution as smog cloaked the city on Friday. (CNS photo/ Xiongran)
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Photo taken in CBD of Beijing, China, Nov. 13, 2015. Beijing government issued a yellow signal warning against heavy pollution as smog cloaked the city on Friday. (CNS photo/ Xiongran)