On Tue, 27 Oct 2009 08:54:12 +0000, The Natural Philosopher wrote:

candles produce lots of CO2.

Which may or may not be a problem depending on the source of the wax
used to make 'em. Sourced from fossil resource (aka oil) bad as
carbon that has been locked up for millions of years is released.
Sourced from say bees carbon neutral as the carbon was obsorbed from
the atmosphere by the plants the bees foraged on in the last year.

--
Cheers
Dave.