New Delhi, Dec. 20 -- Serpentine queues continued outside pollution-under-control (PUC) certification centres across the Capital for a third consecutive day on Friday, as vehicle owners scrambled to get their papers in order to procure fuel, as mandated under the latest set of curbs to cut air pollution. The surge in numbers, however, caused temporary glitches at some centres, exacerbating the wait times for vehicle owners. Environment minister Manjinder Singh Sirsa, meanwhile, said that the government has stepped up its crackdown on polluting and non-compliant vehicles, and 11,776 challans on Friday. "Teams from multiple departments, along with the Delhi Pollution Control Committee (DPCC), are working round-the-clock to ensure compliance w...