We’ve all heard about the many problems associated with coal: the dangers of extracting it, greenhouse gases, and the adverse health effects.  One lesser known threat that you don’t hear about is coal’s radioactive content.  A recent study I read http://www.ornl.gov/info/ornlreview/rev26-34/text/colmain.html highlights the fact that those that live near a coal fired power plant are exposed to higher levels of radiation then those that may live next to a properly regulated nuclear power plant.  The problem with this of course is that most of the electric generation in this country is of course fueled by coal plants.  At least 52% of the electricity generation is coal-derived.  In some areas of the country such as Utah this figure is much much higher–probably somewhere around 80%.  Radioactive content of coal contains a significant amount of thorium, but also contains some uranium.  Many types of decaying isotopes also contribute to radiation emissions such as radium, radon, bismuth, and lead. There is actually more nuclear fuel content released then actual coal energy consumed–making it clear that coal-fired power production is highly inefficient.