I am from the Kootenays and I now have a place down in Tulum. I am interested in earthbag, etc. I realize some of the challenges there. I'll be interested to hear about how things work out for you. I will be in Tulum Dec. 20 - Mar 1. Here is a link. Not sure if you saw this one before:
http://momenttomomentdk.blogspot.ca/2011/08/sustainable-building-in-tulum.html
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