Pratt and Whitney's are not carbon credit compliant. ; )
I can't even afford carbon offsets for my Briggs and Stratton.
Not the JT3 engines at least. Some of our newer ones, still in development, are going to be much greener. Plus PW's manufacturing processes are some of the best around (does that sound too much like a commercial?).
By the way, looking at your screen name, think Travoltas 707 has an EGPWS (Enhanced Ground Proximity Warning System)?