India, Dec. 17 -- Visibility and air quality index (AQI) showed marginal improvement in Gurugram on Tuesday, though dense smog continued to persist across major stretches of the city, including Golf Course Road, areas near Cyber City and the Delhi-Jaipur-Gurugram (NH 48) expressway during late night and early morning hours,district administration officials said.

According to the India Meteorological Department (IMD), visibility improved from about 800 metres at 8.30am to nearly 7,000 metres by the evening. However, IMD officials said that pollutant dispersal remained poor as wind speeds weakened over the course of the day. Winds blowing at around 8 kilometres per hour in the western direction in the morning slowed significantly by evenin...