What struck me is how much Buddhist themes keep popping up. Admittedly, I see the Dhamma everywhere I look now, since it's about fundamentally human issues and not "Buddhist" ones. But this movie, more than others, seemed to pique my notice.
For example, reducing environmental impact inevitably involves abandoning the obsessive consumerist pursuits, which they do. Initially, it's like going through detox. The wife, self-admittedly, is struggling especially, and at one point says "It's like the wanting part of me is dying" (a.k.a. craving, clinging, nidanas) At a later point in the film when she has more perspective on the project, she mentions how "consumption for the sake of consumption" leads to a kind of "coma" (i.e. ignorance).
What's also interesting is that after the detox, they actually find life to be much more satisfying. They get out of their home (since there's no television, internet, etc.) and the days "feel like they last forever." Even the name "No Impact Man" is a restatement of ahimsa.
If you're at all interested, check it out:
movie: http://tiny.cc/NIM
blog: http://noimpactman.typepad.com/blog/
book: http://us.macmillan.com/noimpactman
P.S. I'm not "No Impact Man" in disguise. I just liked the movie.
