Mumbai’s average PM 2.5 level four times above WHO limit: report
Mumbai had an annual average PM 2.5 concentration of 41.3 micrograms/cubic metre, which is nearly four times above the WHO limit, according to IQAir, a Swiss group that measures air quality levels based on concentration of Particulate Matter (PM) 2.5. In the last one year, there was improvement in the annual average of PM 2.5 …
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