John,
     The initial source comes out of volcanoes. We then gather it out of=20
the atmosphere. One mark for the pseudo-scientists.
Thanks,
rich!

On 11/6/2014 8:07 PM, John Gardner wrote:
> I'm nearly ten years removed now from daily TIG welding.
>
> Relatively late in my career LCD shutters came along. I was
>
> interested, but regular product safety recalls dampened my
>
> enthusiasm -  In these days of "Made in the PRC" everything,
>
> I think I can continue to get on without LCD shutters.
>
>
> I also hear that commercial Argon is now proposed for regulation
>
> as a "greenhouse gas".  Last time I looked, the source of commercial
>
> Argon is the atmosphere...

--=20
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