Earlier posts here discussed 'clean coal' (No Such Thing), the negative impacts on the environment of extracting coal by mountaintop removal and the detrimental effects of mercury and other pollutants on human heath. Recently, Frank Hugar wrote a letter to the Buffalo News Editor raising yet another hazard of burning coal: radioactive isotopes in the gaseous and particulate combustion products. To see his letter, "There’s no such thing as clean coal, never will be", click here.