in Table 3). Then, several open pit mining areas were closed down
between 1990 and 2007 (compare the CORINE land cover maps in
Figs. 5 and 6; top left) and the lignite output has been reduced. As
a consequence, the whole case study region’s supply/demand ratio
declined to 0.5, indicating a clear dependence on energy imports
(data references in Table 3)