If you don’t live in the four metros, you may have to start learning how to live with polluted air.Because the roadmap, which the Supreme Court endorsed last year, promising relief for cities across the country and setting deadlines for greener fuel and greener vehicles is under serious threat.The roadmap, prepared by a panel headed by CSIR chief R A Mashelkar, had been approved by the Cabinet. But now three Ministries, Surface Transport, Petroleum and Finance have all got together to suggest ‘‘changes’’ in key elements of this roadmap. PITY EVERYONE CANNOT MOVE TO NEW DELHI