sarah wrote:

>FWIW to produce aluminium from ore is said to require 20x more energy
>than from the recycled metal: if you're not trying to find a way to
>recycle your foil, you should be :-)

Aluminium smelters are so power hungry that they are generally built
with accompanying hydro-electricity plants so the energy that goes
into extracting aluminium is carbon neutral.

--
Phil Cook looking north over the park to the "Westminster Gasworks"