Figure 22From: Long-term monitoring of environmental change in German towns through the use of lichens as biological indicators: comparison between the surveys of 1970, 1980, 1985, 1995, 2005 and 2010 in Wetzlar and Giessen Development of the climate index (KI) in Giessen and Wetzlar (unweighted) between 1970 and 2010. Back to article page