Warsaw: Heavy Smog with High Concentrations of Fine Particles

Poland, a major coal-producing and using nation, is recording high concentrations of fine particles in the air above its large cities. In Warsaw in the winter, the concentration at times exceeds European standards by a factor of ten. The smog is primarily caused by the still frequent use of coal-fired furnaces, many of them old and poorly maintained, and by the burning of all types of waste outdoors.