The caretaker government plans to ban two-stroke vehicles in all the district headquarters and metropolitan cities to reduce greenhouse gas emissions that contribute to hazardous global warming. "Government is thinking about making cities and district towns clean by getting rid of two-stroke engine as it causes massive air pollution,' Raja Devasish Roy, special assistant to chief adviser on Chittagong Hill Tracts (CHT) and Forest Affairs, told UNB. He said the government will take steps to create awareness among the people against the use of two-stroke engines.