External factors behind cap­ital’s ‘very poor’ AQI

The deteri­or­a­tion in Delhi’s air qual­ity, which was skirt­ing the “very poor” cat­egory on Sunday, was caused more by external factors than from sources within the cap­ital, accord­ing to the Centre’s Decision Sup­port Sys­tem (DSS). Data on Sunday showed at least 67.89% of Delhi’s total PM2.5 con­tri­bu­tion was from external sources.