Mumbai, Jan. 27 -- The city recorded its worst air quality for the month so far on Sunday with air quality index (AQI) at 265, which falls under 'poor' category. The pollution, however, declined on Monday, with AQI at 178 (moderate) for PM2.5 pollutant (particulate matter of 2.5 micron size that can easily enter the lungs and cause ailments), according to the System of Air Quality Weather Forecasting and Research (SAFAR)....