Herald: DRIVERS of the most polluting vehicles in the Scottish capital are to be hit with higher parking charges, it was announced yesterday. The cost of annual parking permits for vehicles with the highest emissions will double to £320 a year under a new Edinburgh Council City scheme, first highlighted in The Herald in 2006. But motorists with cleaner and more efficient cars will see the cost of parking reduced to as little as £15 a year. The council said it hopes the creation …