On Thu, Nov 6, 2014, at 06:07 PM, John Gardner wrote:

> I also hear that commercial Argon is now proposed for regulation
>=20
> as a "greenhouse gas".=20

Source?

Wikipedia says the opposite:

"Although contributing to many other physical and chemical reactions,
the major atmospheric constituents, nitrogen, oxygen, and argon, are not
greenhouse gases."

Cheerful regards, Bob

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