Back in February, a new Harvard study found that "when the entire life-cycle of coal is considered -- extraction, transport, processing, and combustion," they add up to a cost to the American people of "roughly US$300 to US$500 billion dollars annually." Then, in April, we wrote about our interview with Professor Michael Hendryx of West Virginia University, whose research has found that coal mining "is a loser economically, environmentally, and in terms of public health." Now we've got yet another economic analysis coming to the same conclusions.