Designer Hyunje Joo stacks and rotates reclaimed concrete pipes into an open-ended pavilion at the Museum of Contemporary Art Busan, transforming industrial leftovers into tunnels, slides, and climbing walls. The project pointedly confronts concrete’s outsize carbon footprint — 4–8% of global CO₂ emissions — by turning discarded infrastructure into inhabitable play, without imposing a fixed hierarchy of use. It’s a sharp, unromantic proposal for what reuse can look like in public space. Source: designboom