More than one lakh vehicle owners applied for Pollution Under Control certificates in the last three days amid intensified enforcement against polluting vehicles in the national capital, Delhi Transport and Health Minister Pankaj Kumar Singh said on Saturday. Singh said the BJP government is working on long-term and data-driven solutions to address air pollution in the national capital, asserting that transport-related emissions contribute around 20-25 per cent to Delhi's overall pollution. Singh said that in the last three days, a large number of people have come forward to obtain PUC certificates. Over one lakh people registered for PUC certificates during this period, including more than 40,000 on December 19 alone, he added. The minister said officials from the Delhi Pollution Control Committee (DPCC) and police are deployed at petrol pumps with cameras used to monitor vehicles. First-time violators are issued warnings, while repeat offenders face challans, he said, adding tha