CFL also yields an overall reduction in HG (Score 1)

HG pollution is a major concern, and there have been comments posted about proper disposal of CFL bulbs (due to the HG content) and such. I was concerned about this too. Here's an interesting "Fact Sheet" from NEMA (the National Electrical Manufacturers Association) and apparently from the EPA as well. Take this with whatever amount of salt you like.

EPAFactSheet - CFL [PDF]

For the lazy:

• The amount of mercury in a CFL's glass tubing is small, about 4mg.
  
• Ironically, CFLs present an opportunity to prevent mercury from entering our air, where it most affects our health. The highest source of mercury in our air comes from burning fossil fuels such as coal, the most common fuel used in the U.S. to produce electricity. A CFL uses 75% less energy than an incandescent light bulb and lasts at least 6 times longer. A power plant will emit 10mg of mercury to produce the electricity to run an incandescent bulb compared to only 2.4mg of mercury to run a CFL for the same time.
  

Note: The NEMA website clearly states, "NEMA is the leading trade association in the U.S. representing the interests of electroindustry manufacturers of products used in the generation, transmission and distribution, control, and end-use of electricity."