In Ashio, the production of copper totaled more than 40 percent of Japan's total copper output.The Ashio Mines made a great contribution to the development of Japanese industry. On the other hand, it was said to be "the root of environmental pollution" as the place where pollution problems happened first in Japan. One of the notorious matters was sulfurous acid gas emitted by the smelter's chimneys. It affected all people living in Ashio. The smoke damage continued from the middle of Meiji period to about the 30th year of the SHowa period(1955). It damaged plants, and soon there were no trees left on the mountain. Because of this, the mountains were called "HAGEYAMA" (which means "bald mountain")
Recently, many organizations including national, perfectural and private sectors, and the NPO group "Growing Greenery in Ashio" are working to restore greenery on Ashio's mountains. It is drawing attention from all over Japan, creating opportunities to think about environmental problems. There are many efforts now to revive Ashio from its "root of environmental pollution" past to a place rich in nature once again.
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The state of the "Matsuki"valley