NGO based in Nigeria, made a Africa's first plastic bottle house,it is bullet and fireproof, earthquake resistant, and maintains a comfortable interior temperature of 64 degrees Fahrenheit year round !Africa’s First Plastic Bottle House Rises in Nigeria
Tires are the main building component of ecological houses known as ‘earthships’. Common in the deserts of the U., they're also ideal as low-cost housing in third world countries. 30 Eco-Chic Houses Made of 10 Types of Recycled Materials.
Cob homes! And the website has more construction types for sustainable housing I'm loving these example of larger family sized cob homes that don't all look like hobbit holes.) I like that cob can be freeformed