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Studies reveal coal to be among the least expensive electricity-producing fuels.

At 4 to 6 cents per kilowatt-hour, who can argue? Solar is falling from accounts of 12 pennies (and up) per kWh into an estimated parity with fossil fuels, according to a study by Queen's University. And wind power is becoming cheaper. There is also something I only discovered called atmospheric chilly megawatts technologies, however, I digress.