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| 2008 || || || Beijing holds the Olympic Games, and starts policy to eradicate cockroaches, flies, and mosquitoes in a bid to make the city cleaner and more “civilized.” <ref name="Beijing Urbanizes"/>
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| 2013 || || || As part pof a campaignmcampaign, Beijing starts phasing out coal-fired stoves in the city. Natural gas and other forms of clean energy are used to replace coal.<ref name="Beijing, northern China hit by worst pollution this year">{{cite web |title=Beijing, northern China hit by worst pollution this year|url=https://economictimes.indiatimes.com/news/environment/pollution/beijing-northern-china-hit-by-worst-pollution-this-year/articleshow/66618105.cms |website=economictimes.indiatimes.com |accessdate=12 May 2019}}</ref>
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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"/>
