Coal, which started out as the cheapest of fuels, is a victim of its own success. The more coal we burn the more expensive it becomes as we are forced to deal with more and more unintended environmental consequences. A clean power plant requires expensive additions to protect public health by removing particulates, Nox, sulphur and mercury. Now climate change is adding an urgent need to remove CO2 emissions. Since every ton of coal burned produces 3.7 tons of CO2, this is an almost impossible task that will take at least ten years to develop and will almost double the cost of coal power. Coal is no longer cheap when you consider these extra costs.