On an average day in West Virginia, about 3 million pounds of explosives are detonated during the process of mountain top removal to exhume coal seams.   That's the energy equivalent of 3 Hiroshima-sized explosions every month.  Money line: "I feel that the US Congress should maybe send a registered letter to Japan next August saying, 'See? Really, it wasn’t anything personal.'"  Via A Tiny Revolution.
One addendum: I'm not an expert, but mining often uses the diesel/ammonium nitrate explosive.  It's cheap, and relatively safe to handle and transport.
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