Which city is not the part of Taj Trapezium?

Taj Mahal is being corroded by acid rain. Under the action plan, Taj Trapezium-an area that includes the towns of Agra, Mathura and Firozabad in UP and Bharatpur in Rajasthan- has been declared to be made pollution free by use of natural gas or LPG in industries instead of coal or oil.CNG run vehicles are being encouraged in this region.