PUT UP or STFU.
My only problem with the letter is that it is addressed to the Department of State. Not Congress. Or the EPA. Or the President. Which, absent unlisted cc’s, gives those “worthies” license — or at least an excuse — to ignore it, or to plead not having seen it.
Pressure should be brought to bear on Republicans (and, for that matter, Democrats) in Congress to demand HARD proof of CAGW before a single jot or tittle is put down on any “climate” bill.