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"\nAir pollution levels remained high yesterday, with concentrations at all 11 general monitoring stations exceeding World Health Organisation guidelines, Greenpeace said.\n\nReadings at the three roadside stations - in Causeway Bay, Central and Mong Kok - were 'very high' throughout the day, with the air pollution index hitting a high of 135 in Causeway Bay at 11am. \n\nAmong the 11 general stations, Kwai Chung  fared worst at 93.\n\nAn air pollution index of over 100 indicates the pollutants  pose immediate he..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.scmp.com/article/682312/smog-11-stations-exceeds-who-limits>