TheaveragedensityofPM2.5inBeijingfromJanuarytoNovemberwas58microgramspercubicmeter,down13.4percentyearonyear,themunicipalenvironmentauthoritysaidFriday.Accordin
China's State Oceanic Administration (SOA) is widening its scope and sampling water at more sites despite falling densities of key toxic substances in waters near the Tianjin blast site.
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