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Air pollution in China is a persistent and nagging problem. The WSJ's Alyssa Abkowitz speaks about some new devices that help Chinese people breathe easier. Photos, clockwise from bottom: CoClean, Ecovacs, Broad Group Subscribe to the WSJ channel here: http://bit.ly/14Q81Xy More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Follow WSJ on Facebook: http://www.facebook.com/wsjvideo Follow WSJ on Google+: https://plus.google.com/+wsj/posts Follow WSJ on Twitter: https://twitter.com/WSJvideo Follow WSJ on Instagram: http://instagram.com/wsj Follow WSJ on Pinterest: http://www.pinterest.com/wsj/
