Sofia, Bulgaria, plan for #freepublictransport for PM pollution

focus-fen.net : "Sofia. Sofia municipality will present a plan against air pollution. The focus in it will be prohibiting diesel cars without catalytic converters and introducing national standards for fuels used for heating. The plan also includes free public transport at sustained high levels of fine particulate matter. Mayor of Sofia Municipality Yordanka Fandakova will present in detail all the measures for improving air quality – short-term, mid-term, and long-term ones."