Govts. of Delhi, Haryana, Punjab, U.P., Rajasthan asked to ensure monitoring of paddy cultivation areas, especially identified hotspot villages and fire-prone locations; conduct drone surveys from 3 p.m. to 9 p.m., when attempts to evade satellite detection are more likely, pollution watchdog also says Govts. of Delhi, Haryana, Punjab, U.P., Rajasthan asked to ensure monitoring of paddy cultivation areas, especially identified hotspot villages and fire-prone locations; conduct drone surveys from 3 p.m. to 9 p.m., when attempts to evade satellite detection are more likely, pollution watchdog also says