In article ,
John Rumm writes:

I am sure they have given serious thought (what is the emoticon for
irony?) to the environmental impact of landfilling all those dimmer
switches complete with power semiconductors, followed by the amount of
extra mercury that will follow from the CFLs

Burning extra fossel fuel to provide the extra energy used
by filament lamps over a CFL generates about 2.5 times as
much mercury polution as the mercury contained in an equivalent
CFL plus the reduced mercury from reduced fossel fuel burning.
CFL's are starting to appear with only 1/3rd of the mercury
content they've had up to now, which will make the CFL advantage
even larger in this respect.

--
Andrew Gabriel
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