Fertilized by the comments in this thread, I came up with "resilient renewal" as a substitute for "sustainable".

Yeah, resilient is good. In Europe though, it is generally understood as applying to human beings, because of the popularity of one author, who touted that concept, Cirulnik, a psych type who argues that many ppl who experience terrible trauma bounce back, live on, love, reproduce happily, etc.

one book by him in English:

http://www.amazon.com/Whispering-Ghosts-Trauma-Resilience/dp/159051114X