Beijing's official air quality index reached a maximum level of 500 on Sunday morning, with floating particles known as PM10 surpassing 2,000 micrograms per cubic metre in some districts. By March 28, 2021 at 02:06PM Read More https://timesofindia.indiatimes.com/world/china/beijing-enveloped-in-hazardous-sandstorm-second-time-in-two-weeks/articleshow/81734308.cms
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