For the first 9 months of 2019, Delhi’s PM2.5 dropped 4%. Back to 2015, Delhi’s PM2.5 is mostly flat. Thus, Delhi’s air has seen little improvement over the last four years.
Either way, Delhi’s air pollution levels are still dangerously high. The 2019 average of 80µg/m3 so far is 8 times higher than the WHO’s annual limit.
Click here to read more: https://smartairfilters.com/en/blog/delhi-pm25-air-pollution-2019-analysis/
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