Roger Dewhurst wrote:
"Roger Coppock" wrote in message
ps.com...
"The maximum CO2-concentration in
the 20th century roses to over 420 pmm in 1942."

LOL There's a flowery claim if there ever was one.
Is pmm a kind of rosebush?

No, it's a form of ambergris. Of course if you have attar, the whale
vomit might come in handy. **** and roses go together in the garden and
in perfumery.

As does carbon dioxide and methane I suppose, in the natural cycle of
events that is.