People from Africa to Latin America are recycling bottles and using them to build fireproof, bulletproof, environment friendly homes. For about a quarter the cost of a conventional home, folks can build a two-bedroom house from 14,000 recycled plastic bottles by using the technique known as bottle walls. The bottles are filled with sand and stacked on their sides using cement filling frames to create solid walls – a foot or more thick – that insulate and protect the people inside.
The idea addresses both homelessness and pollution at the same time. Nigerians have been getting help from Ecotec Environmental Solutions, a German firm since 2011, which is teaching them how to build with this model.