The Telegraph. The state government of West Bengal in India is ordering all commercial vehicles manufactured before 1990 off the roads of the Calcutta (Kolkata) Metropolitan Area unless they convert to liquefied petroleum gas (LPG) or compressed natural gas (CNG) by the end of the year.
Transport department officials say more than 50,000 vehicles—including some 9,587 taxis, 7,464 buses, 6,784 auto rickshaws, 1,164 minibuses and nearly 30,000 trucks and vans—will have to be taken off the roads after the ban comes into effect.
A recent study by the Calcutta-based Chittaranjan Cancer Research Institute and Calcutta University indicated that close to 50% of the city’s residents suffer from major respiratory disorders. Cases of lung cancer are also increasing throughout the city because of the high level of air pollution.