A new option for creating fire breaks and slowing down forest fires : r/Damnthatsinteresting
https://www.reddit.com/r/Damnthatsinteresting/comments/1na1u3v/a_new_option_for_creating_fire_breaks_and_slowing/
Interesting. Slow, but it looks like part of the idea is that you can use it during periods of high fire risk, which you can't do with a normal burn.