grikdog says...

Q. How many environmentalists does it take to screw in an energy-efficient light bulb?

A. One. One to begin screwing the bulb in, one to criticize its mercury level and potential long-term effects on the city landfill, one to begin screwing the bulb back out, one to reconsider the bulb's mean time to failure and projected long term energy savings, and one to remember she got her B.A. in Home Economics.