When coal is burned, various filters and scrubbing methods are used to remove pollutants (sulfur dioxide, mercury, arsenic, lead, cadmium and other toxic heavy metals, and trace amounts of uranium) from the exhaust. This does nothing to abate the global warming gasses like CO2 and SO2 that are produced. These captured solids and the ashes are stored in giant holding ponds, which become massive human and environmental hazards.Read More →