With the onset of winter in Delhi, there is a lot of increase in air pollution. This morning the white sheet of mist remained here and the air quality has been recorded very poor, according to CPCB, the hourly air quality index in metropolitan Delhi remains at 371, which is a very poor category.br br दिल्ली में सर्दियों की शुरुआत के साथ ही वायु प्रदूषण में काफी बढ़ोतरी देखने को मिल रही है.