Dave wrote:

What year did this greenhouse gas theory come into the English language.

Which theory? The scientific one or TMH's?

And why is English significant? I have no idea whether the scientist
cited below published in English but I am sure his work would have been
well known among the wider scientific community just as Tyndall's
earlier work would have been known to Arrhenius.

http://en.wikipedia.org/wiki/Svante_...enhouse_effect