Question raised in Lok Sabha on Impact of Pollution on Historical Monuments, 10/05/2016. The Archaeological Survey of India (ASI) and Central Pollution Control Board (CPCB) are continuously monitoring ambient air quality in 254 cities / towns in the country including vulnerable monuments. The climatic conditions around the monuments also play a very important role in dispersal of pollutants as well as on the impact of pollutants on monuments like Taj Mahal, Red Fort, Humayuns Tomb etc. The conditions of monuments is constantly assessed and reviewed. Regular scientific cleaning and other treatments to such monuments are also given for removal of harmful deposits and improve the look aesthetically. By such actions, adverse effects on the monuments are minimized. ASI is constantly monitoring the situation and applying the remedial measures regularly. No specific nation wide study has been done to assess the impact of the pollutants on monuments has been done by Ministry of Environment, Forest and Climate Change / CPCB.