I've seen a number of these "doomsayer" documentaries and I'm mostly in agreement that the human race is out of control and trashing nature to death. This one did a good job of outlining the major aspects of our predicament, but it lacked stunning examples to convince Joe Six Pack that the problems are severe enough to warrant the grim tone. It seemed to assume viewers were already advocates for sustainability, while at the same time acknowledging that most are too brainwashed by "Empire" to care. (As an aside, I've never seen the word "empire" used without "an," "the" or "our" preceding it; something about that annoys me.)
I found about two thirds of the presentation solid and informative, but it strayed into preachy areas that were overwrought and repetitive, especially the "walkabout" segment toward the end. It kept seeming like a closing statement was made, then it cut back to more interview segments and the message got scattered. Also, some of the interviewees didn't exactly come across as ecology experts (e.g. artists), though they were on the right track. I'm more pragmatic than a Kumbaya type.
When I watch these documentaries I'm looking for something that will sway the tiresome global warming & peak oil deniers, and leave no room for snide "tree hugger" remarks. We really have to get those people on board if there's hope of averting mass chaos. Skeptics of a finite Earth aren't all that bright, but they could be better convinced by irrefutable evidence vs. touchy-feely commentary, which this film lapsed into heavily at times. A lot of people simply lack the empathy to be concerned for nature, and they will only act out of self-interest. I can imagine this film being snickered at by them.
To improve it, they could have trimmed the beginning and ending for a more concise message. Some of the interviewees were especially strong, and some could have been left out. I give it a 9 for thematics but a 5 overall for its repetition of New-Age mantras.