Chapter
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There are up to 500,000 abandoned mines in the United States, with the Bureau of Land Management only discovering about 31,000 of them so far.
07:37 - 08:50 (01:13)
Summary
There are up to 500,000 abandoned mines in the United States, with the Bureau of Land Management only discovering about 31,000 of them so far. While they are actively trying to locate them, urban explorers should avoid seeking them out due to the risks involved.
ChapterEnvironmental hazards of mines
EpisodeSelects: What happens to abandoned mines?
PodcastStuff You Should Know
Mining can generate environmental hazards such as acid rain and groundwater, as well as portable and stable mercury compounds.
08:52 - 11:49 (02:56)
Summary
Mining can generate environmental hazards such as acid rain and groundwater, as well as portable and stable mercury compounds. Additionally, mining features like holes in the ground, including ones formed due to mine collapse, are called "glory holes."