Pollution damage to the environment was investigated in Nagoya prefecture in 1972. In the Nagoya area, lichens were investigated as air pollution indicators. Sectors found to be lichen deserts were the south and southwest. Insects (dragonflies and butterflies) were found to be greatly reduced in number, along with fireflies and certain rare wild plants. The number of wild birds and animals has not noticeably decreased, although geographic distributions are changing due to alterations in land use patterns.