Department of Environment and Delhi Pollution Control Committee tested anti-smog gun near Anand Vihar Bus Station in presence of Environment Minister Imran Hussain on Wednesday. At the time of trial, the AQI stood at 414- 'Hazardous' level. To deal with haze during winters, the Delhi government was mulling using anti-smog guns to bring down pollution level in the national capital. Environment Secretary Anil Kumar Singh on Monday apprised Lt Governor Anil Baijal of the trial run of anti-smog gun in a meeting to review the detailed action plan of agencies and stakeholders on measures to combat air pollution.