New Delhi, Nov. 20 -- Despite multiple studies questioning their usefulness, the Anand Vihar anti-smog tower continues to run at a monthly operating cost of nearly Rs.11 lakh, the Central Pollution Control Board (CPCB) has said in a fresh RTI response. The tower, installed by CPCB, is operated by Tata Projects Limited "at a cost of Rs.10.27 lakh per month, exclusive of electricity cost, GST, taxes and project management consultant (MC) charges," the agency told activist Amit Gupta. Construction alone cost around Rs.20 crore, including Rs.18.52 crore for civil and structural work and NBCC's project management fee, it said. CPCB cited performance evaluations by IIT Bombay and IIT Delhi, stating that "observed values indicate up to 20% reducti...