<span style="color: #222222;">The air pollution level in the national capital has slightly improved and is in the moderate category. The air quality index was recorded at 169 this evening according to the Central Pollution Control Board (CPCB). </span><br />'' <span style="color: #222222;"><br />''The CPCB has opened social media accounts on Twitter and Facebook asking people to lodge complaints on air pollution incidents in Delhi and adjoining areas. All construction activities involving excavation have been stopped. </span><br />'' <br />'' <span style="color: #222222;">The stone crushers and hot mix plants generating dust pollution have also been closed. A ten-day-long clean air campaign is ongoing in Delhi to monitor and report polluting activities as well as to ensure quick action. </span><br />'' <br />'' <span style="color: #222222;">Under the campaign,  around 80 lakh rupees penalty has been imposed on violators in the last two days in Delhi-NCR. </span>