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| 2017 || || || Average PM2.5 pollution level in Beijing remains 65% above the national standard – and six times above the {{w|World Health Organization}} guidelines.<ref name="Beijing Urbanizes"/>
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| 2017 || October || || Beijing starts the biggest shutdown of steel factories in history. The measures are a part of an aggressive nationwide action plan that aims to cut wintertime particulate pollution by 15% year-on-year over the next five months.<ref name="Beautiful China">{{cite web |title=‘Beautiful China’: Beijing starts the biggest shutdown of steel factories in history |url=https://unearthed.greenpeace.org/2017/10/30/china-starts-the-biggest-shutdown-of-steel-factories-in-history/ |website=unearthed.greenpeace.org |accessdate=14 May 2019}}</ref>
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