The Delhi-NCR pollution is showing no sign of abating and is now alarming. The air quality index (AQI) has been constantly rising since the withdrawal of the monsoon in north India and is now alarmingly high. While the World Health Organization (WHO) guidelines specify a maximum of 15 μg/m 3 of PM (particulate matter) 2.5 exposure in 24 hours, the figure is nearly 26 times higher in Delhi-NCR. As per air quality tracker aqi.in , the PM 2.5 level was 384 μg/m 3 at 7 AM on Wednesday. PM 2.5 levels in the past 24 hours (Source: aqi.in).

For Delhi -NCR, more alarming is the larger PM 10 pollutant. The WHO says PM 10 exposure should not exceed 45 μg/m 3 in 24 hours. However, that was nearly 12 times higher at 517 at 7 AM on Wednesday. The PM 10 level in Delhi is far higher than t

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