This is part 2 be sure to watch part one as well as my in depth introduction to cob building as well as the articles linked in this post.
Cob and earthen building are not only ancient but still practical and in most ways superior even now days.
Research, question evolve∞§∞
Here is a link for a more in depth talk I did on cob to give you background for this video where I actually use it to make a rocket stove for free using the amazing sustainable power of cob.
https://www.dlive.io/video/quinneaker/bd2de950-2008-11e8-be01-5bf7a6e5d482
My video is at DLive