Actually formaldehyde is emitted by a number of plastics upon polymerization.
Polyurethane is one of the primary ones if I remember right.  Anyway, not only
carpet but foam fill insulation for houses will also emit this compound. It can
actually be quite a health hazard if houses are made reasonably air tight.

Marshall

Judith Thamm wrote:

> Dear Karen,
> I think it is Dr Hulda Clark in her book The Cure for All Cancers who lists
> carpet as emitting formaldehyde.
> Regards,
> Judith.
>
> > Hi~
> >     It seems that I have read that carpeting usually has chemicals in it
> that
> > are hazardous to your health.  Does anyone know of sources of information
> on
> > this subject or a way to select carpet with the least amount of harmful
> > chemicals?  Thanks in advance for your help.
> > Karen
>
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