Even as the air quality in Delhi improved marginally to the 'very poor' category from 'severe', haze continued to envelop the national capital. The PM 2.5, the fine particulate matter that can penetrate the respiratory system and affect us, are 30-40 times more than the safe limit set by the World Health Organization (WHO).
Even as the air quality in Delhi improved marginally to the 'very poor' category from 'severe', haze continued to envelop the national capital. The PM 2.5, the fine particulate matter that can penetrate the respiratory system and affect us, are 30-40 times more than the safe limit set by the World Health Organization (WHO).