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. 2020 Jun 19;4(8):1681–1687. doi: 10.1016/j.joule.2020.06.009

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Timeline of PM2.5 Concentration in Delhi

PM2.5 particle concentration measured at the US Embassy in Delhi between February 1^st and April 30^th for the years 2017 to 2020. The graph on the bottom shows the relative deviation of 2020 values from those of previous years (2017 to 2019). Solid lines are running averages over 1 week.