Very near completion with this edit, and I was able to remove or cut down on every single scene that really bugged the hell out of me. The environmental "message" is now almost entirely gone, and what little is left is very minor and unobtrusive, and applies only to the world of Pandora (not some other planet light years away that is biologically very different Mr. Cameron - all your poorly conceived, and executed environmental points have been excised).
Pretty much all of the other political jabs were removed as well.
It looks like the total time cut will be somewhere between 18 and 19 minutes.