While outdoor pollution level appeared to drop during #Covid-induced periods of #lockdown, ... - Latest Tweet by IANS Tweets

While outdoor pollution level appeared to drop during #Covid-induced periods of #lockdown, particulate matter (PM) 2.5 levels were on average 23 per cent higher indoors, according to a new study. pic.twitter.com/DzDk6Jej3S— IANS Tweets (@ians_india) June 13, 2021

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