Mercury in energy-saving bulbs worries scientists - Yahoo! News:
"The mercury content in the average CFL -- now about 5 milligrams -- would fit on the tip of a ballpoint pen, according to the U.S.
Environmental Protection Agency, and manufacturers have committed to cap the amount in most CFLs to 5 milligrams or 6 milligrams per bulb.
The majority of Philips Lighting's bulbs contain less than 3 milligrams, and some have as little as 1.23 milligrams, said spokesman Steve Goldmacher.
To prevent mercury from getting into landfills, the EPA, CFL makers and various organizations advocate recycling."