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Stronghold Digital Mining ($SDIG@US), a Bitcoin mining company, is using waste from the Panther Creek Coal Plant in Carbon County, PA to power its Bitcoin mine. The company purchased the defunct coal plant and set up operations to sift through the refuse on the site. Workers transport the coal waste and separate the usable coal. The coal is then used to generate electricity for the Bitcoin mining servers or its sold back to the grid for profit. Pennsylvania has millions of tons of leftover coal waste near communities, where it could pollute groundwater and release toxins in the air. Stronghold expects to have the four million tons of coal waste cleared in a few years.