China's toxic smog - BBC News

For much of the past month, a huge swathe of northern China has been shrouded in a thick layer of toxic smog. Pollution has reached such high levels that Beijing's met office this week issued a warning against venturing out into the snow because of fears it's dangerously contaminated. With pollution now thought to be the cause of more than a million premature deaths a year, our correspondent John Sudworth travelled to China's most polluted city Please subscribe HERE http://bit.ly/1rbfUog World In Pictures    • Playlist   Big Hitters    • Playlist   Just Good News    • Positive stories | BBC News