S15E3: Train Rails, Desalinated Water, Racing Wheelchairs, Parquetry

Recycled steel is melted, cast and rolled into long sections of train rail before being straightened and inspected. Seawater passes through filtration and high-pressure membrane systems to become drinking water; lightweight tubing is shaped around an athlete’s measurements to build a racing wheelchair; and precisely cut hardwood pieces are arranged into decorative parquet flooring.