https://www.youtube.com/watch?v=FFCNCQleCuk
Marvelously simple 2 minute presentation on what The Natural Step is all about.
I think if you wait for the next video to load, it starts a several part presentation that's more in depth and also more practical. If it doesn't and you're interested, this is the next one.
https://www.youtube.com/watch?v=beidaN3SNdA