Amongst the ten finalists in this year's World Challenge is the Guatemala-based NGO Long Way Home founded by former Peace Corpsman Mateo Paneitz. This clip shows how the non-profit has been working with the local community in Comalapa, specifically introducing recycled materials such as car tyres and plastic bottles into local construction practices.
There are many worthy entries and you can visit the site to vote for your personal favourite. Right now ours is the jompy stove invented by Scottish plumber David Osborne, largely because it would so clearly have widespread application across the developing world. Whereas, in the case of tyre-based domestic architecture, we can more readily anticipate several practical and cultural limitations. But check out Long Way Home's site too, because they are involved in a range of interesting projects, including reforestation and wood stoves.