Exelon (EXC) is announcing a program that allows its customers to be certified, emission free energy users.  The new product, called an Emission-Free Energy Certificate (EFEC) will initially be limited to select commercial and industrial customers who already have an existing relationship with Exelon.  Emission free energy is defined as energy that does not directly produce sulfur dioxide, nitrogen oxide or carbon dioxide and includes solar, wind, hydro, wave energy as well as nuclear.  With Exelon being nation’s largest producer of nuclear power, it should be noted that the primary source of the EFEC’s will be nuclear power.. not exactly the best form of emission free energy.