New Delhi, Dec. 1 -- Strong northwesterly winds brought Delhi a minor respite from bad air on Sunday, ending a 24-day streak of 'very poor' Air Quality Index (AQI) readings and lowering it to the 'poor' zone. On Sunday, the city recorded a 24-hour average AQI reading of 279, an improvement from the 305 a day earlier. From November 6 to 29, the AQI stayed above 300 every day. P5...