From what I’ve seen in the past, NBC’s “green week” spots tend to be pretty naggy, all about annoying things you’re supposed to do to satisfy the moralistic green police. There’s none of the bright green message that a sustainable future can also be sociable, prosperous, and fun. (That’s the hope that animates untold young-ish people who see environmental success as inseparable from a more holistic measure of success.)

NBC may have a welcome departure from its past tone in Harmony: A New Way of Looking at Our World, the hour-long documentary airing tonight at 10 p.m. EST/PST. It’s created by Prince Charles of Wales, well-known for his environmental advocacy in the U.K., and it calls for action defined by a cooperative global spirit. Sounds easy enough …

The film also looks mighty, mighty earnest, so consider yourself warned if you’re prone to nodding off at such things.

There’s also a Harmony book and children’s edition.

And if you want a tour of the remarkable post-coal cleantech economy that Wales is attempting to build, we’ve got you covered.