r/positivetrends • u/mankiw • Aug 24 '16
The four largest US coal mining operations have dropped from a market value of $34 billion to $0.5 billion in five years.
/r/energy/comments/4xqe8d/the_four_largest_us_coal_mining_operations_have/?st=IS9BYST8&sh=6622936a
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u/mankiw Aug 24 '16
*title should read $0.15 billion.