Charcoal

Charcoal is a cheap and efficient source of heating in the Old World. It allows families to heat their homes and hovels affordably. The drawback is that charcoal does not burn cleanly, and clouds of black smoke often blot out the sun over cities, towns and hamlets during the winter. Middenheim is one of the biggest users of charcoal in the Empire.

Source
[[Category:C]]
 * Warhammer Fantasy RPG 2nd ED -- Old World Armoury
 * pg. 61