In the “Warschent” wood there had once been a wood-pile, used to pro­duce char­coal. The small size of this wood pile indi­cates that this kind of pro­duc­tion had only been a side­line for the local farm­ers, who used the char­coal prob­a­bly only to heat their homes. In many woods in Lux­em­bourg, for exam­ple in the Grünewald, char­coal had ever been pro­duced in impor­tant amounts, in order to heat the met­al­lur­gi­cal fur­naces of the Lux­em­bourg iron­works industry.