New Delhi: Delhi’s air quality improved to “poor” on Tuesday due to faster wind speeds, good pollutant “mixed height” and the impact of light rainfall in the early hours of Monday morning, according to scientists from agencies monitoring Tuesday’s average air quality index (AQI ) was 255, the lowest since October 27 when the AQI was 232, and is not expected to deteriorate for the next three days due to moderate winds, even if temperature increases. Gufran Beig, Safar’s founder and project manager, said the wind speed stayed reasonably good with a mixing height of 1.5 km on Tuesday. The mixing height is an invisible boundary layer of the atmosphere within which the movement of air and particles, including scattering, can take place. of pollutants. The lower the height, the smaller the space in which contaminants can spread.