Why concrete might be doing more harm than good in the fight against flood risks

Whether its dams, drains, aqueducts or seawalls, much of the modern world was built on the idea that we can control water. But concrete infrastructure around the world is failing amid unpredictable and often extreme levels of precipitation. Inspired by ancient monsoon cities, landscape architect Kongjian Yu says the solution lies in working with water and using nature as a sponge. 03:29 - Source: CNN