It's true: those energy-saving compact fluorescent bulbs harbor a small amount of mercury within them. Because of the mercury, it's best to dispose of burned-out compact fluorescent bulbs as hazardous waste, and to clean up carefully if one breaks.
Rick Dimont, our Hazardous Waste and Waste Reduction Program Manager, was interviewed in last night's WUSA9 TV news segment, titled "CFLs: Handle with Care."