As air quality in the national capital continues to be "poor", the Supreme Court has reprimanded the centre and civic agencies for lack of action in pollution-related complaints. The court said that the local agencies - the municipalities -- have failed to address the grievances of the citizens and lax officials should be put behind bars. The centre informed the court that 749 pollution complaints were received through social media and over 3,000 through the "Sameer" app, a mobile application launched by the Central Pollution Control Board (CPCB) to enable people to register their complaints, between November 1 and 24.