John Stumbles wrote:
On Thu, 18 Oct 2007 17:19:57 +0100, Peter Parry wrote:

On Thu, 18 Oct 2007 16:08:19 +0100, David Hansen
wrote:

On Thu, 18 Oct 2007 15:26:09 +0100 someone who may be Peter Parry
wrote this:-

You mean like the mercury in CFL's? :-)

How does this compare with the mercury emitted producing the extra
electricity needed to power incandescent bulbs?

Quite badly if compared with sensible generation methods such as
nuclear...

This seems off-topic for alt.solar.thermal,
home of "practical uses for t he sun's heat."

Nick