Nzambi Matee hurls a brick hard against a school footpath constructed from bricks made of recycled plastic that her factory turns out in the Kenyan capital.
It makes a loud bang, but does not crack.
“Our product is almost five to seven times stronger than concrete,” said Matee, the founder of Nairobi-based Gjenge Makers, which transforms plastic waste into durable building materials.
“There is that waste they cannot process anymore; they cannot recycle.”