Stronghold raises 105m to mine bitcoin with superdirty ...
· Coal has been mined in Pennsylvania since the 19th century, and there is more than 450 million tons of waste coal in heaps around the west of the state. These piles create acid runoff which contaminates ground and surface water and they are also prone to ching fire. Scrubgrass opened in 1993, burning the coal waste to make electricity. In ...
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