against "sustainability" (the word, not the policy)

(cross-posted with my personal blog)

Literally (i.e. in normal, non-jargon English) “sustainable” means that it is capable of being sustained over time, whether it is good or bad.

But in environmentalist jargon, “sustainable” means “environmentally friendly” or “non-polluting.”  It seems to me that this jargon creates a completely unnecessary barrier between professional environmentalists/planners and the rest of humanity. 

If we want to say policy X is climate-friendly or otherwise reduces pollution, why not just say “X reduces pollution”?