Construction A Brazilian Electrician Without a College Degree Built a House With 2,700 PET Bottles Filled With Sand and Cement, Investing Only R$ 8,000 and Using a Patented Technique That, According to Tests by UFRN, Is 30% More Durable Than Common Brick and Allows for Ready-Made Walls to Be Assembled in Just 3 Days Valdemar Medeiros 25/02/2026 at 19:30