<span style="color: #222222;">The Air Quality Index in the National Capital Delhi was recorded 389 on Thursday evening.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">The Central Pollution Control Board, CPCB said, the air quality in the city was in very poor category.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">A thick layer of smog blanketed several areas of Delhi today.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">The pollution levels rose due to calm winds and spike in farm fires.</span><br />''