Hallelujah! I think tbe time is near. Now that medical marijuana use has become legal in 23 states the knowledge of cannibus's many uses is creeping into the public domain. Enter Hempcrete -- stronger than concrete and 6% lighter.
The uses of this miraculous plant seem endless.
https://www.youtube.com/watch?v=naGAnhax-tI
It sounds like gunnite,as it is so light.I didn't hear the estimates on strength, but it could be stronger than concrete as well.Gunnite is much stronger than concrete with all the air whipped into it,if you have ever tried to jackhammer it, you know what I mean. I assume you could blow it out of a hopper and build domes with it too, which would cut another 30 t0 40 percent off of the energy needed to heat or cool it, and that's on top of the 50 percent savings they claim. If only the cotton farmers would switch to growing hemp,,,,maybe that day isn't far away!