Affordable Plastic Waste Bricks That Are Stronger Than Concrete Materials engineer Nzambi Matee—the founder of Nairobi-based Gjenge Makers—not only invented a brick made from plastic waste that’s stronger than concrete, but she also set up the factory after losing patience waiting for government funding. The bricks are made from a blend of discarded high-density polyethylene (traditionally used for products like shampoo bottles), low-density polyethylene (plastic …
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