What if thousands of discarded plastic bottles could be used to build homes instead of clogging drains or ending up in landfills? In Kaduna, Nigerian engineer Yahaya Ahmed has spent more than a decade exploring that idea.
His first model house was built using 14,800 plastic bottles filled with sand. What began as an experiment eventually developed into a wider construction initiative, with Ahmed saying his organisation has gone on to build as many as 15 houses across Nigeria.
