E s smells like winter in Germany. The first days with permanent frost announce themselves. In many residential areas, however, residents do not expect clear and clean January air when they enter the open air at wind-quenchable evenings, but rather scent smell. Smoky air rakes, sometimes with a slightly sulphur-containing additional note.
Then the neighbors once again fueled their fireplace or oven. More than eleven million so-called single-room fireplaces are located in German households. However, about four to five million of these do not meet the current requirements of the Federal Immisional Protection Act.
They spread unfiltered and partly unburnt smoke with soot, fine dust and carcinogenic polycyclic aromatic hydrocarbons. Therefore, the open wood fire is not only in the visor of the German Environmental Aid.