MARYIA SAKHAREVICH
NOV. 19th, 2010
I found a tutorial on how to make a roof out of aluminum cans (beer or coke cans). It requires minimal amount of materials (besides all the cans) and the process is quite simple. You can read the step-by-step instructions, but also check out the short video on the first page- it sums up the entire process pretty nicely.
Also, I found this organization called ECO-TEC, Environmental Solutions (was founded in Honduras in 2001). They created the first water bottle house, which is a very eco-friendly, quick construction house, using mainly water bottles, sand, and rubble. It was created in response to massive amounts of water bottles being wasted in the dumpsters (80% of water bottles are not being recycled) so they came up with a solution to a) provide housing, water storage tanks, etc. and b) solve the garbage issue (to some extent). 
Basically, they take 1.5L or 2L plastic bottles, use a funnel to fill it in with local material (such as sand, soil, rubble, etc), and then to bind them together they use soil mixed with clay/mud (every 6 courses they use cement, but otherwise cement is avoided) and bind them with nylon/twine (commonly used in agriculture) afterwards. Because of the use of local materials, each project becomes eco-friendly and 40% cheaper than conventional housing.
Check out their website (the short videos on the left hand side and the list of projects), they explain their various projects in more detail. Sources
Robbtoberfest. Instructables. "Make shingles and siding out of aluminum cans (beer can roof)." Accessed November 19, 2010. http://www.instructables.com/id/Make-Shingles-and-Siding-Out-of-Aluminum-Cans-Bee/
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