This is a article I read of many different materials. A few of the materials were recycled steel, bamboo, straw bales and etc. This was a very informative article to read on all these different materials and how they are sustainable
Earth Air Tunnel - BEEP Website
Earth Air Tunnel – BEEP
Build a Russian Masonry Heater From Bricks – Mother Earth News
Root Cellars - 5 Time-Tested Storage Ideas for Your Bounty
Earthbag Basements
earthbag basement sm
Underground Tubes for Passive Cooling
Step-by-Step Earthbag Building
Homemade Lime Plaster for Earthbag/Superadobe House | Painting & Sponging Walls