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When pollution crosses the line: AQI 500 vs AQI 200 — what these numbers mean for your lungs
On a crisp winter morning, when the sun struggles to cut through a grey, smoky haze, many of us glance at the air-quality index like a daily horoscope, the number that decides whether we mask up, skip ...
Delhi's air quality deteriorated to severe levels with AQI nearing 500. Stage-IV Grap curbs reinstated as residents are urged ...
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