The machine is being developed by Australian startup Crest Robotics in collaboration with Earthbuilt Technology, which has developed an eco-friendly material made from a mixture of sand, glass, and brick fragments. Buildings made from this material are strong, moisture- and fire-resistant, and the use of local components will help reduce the carbon footprint. Instead of performing a multitude

Giant barriers were built at the mouths of three city rivers back in the 1970s: if the water level rises above a critical level, they lower, preventing flooding of nearby areas, and they were made arched to allow large ships to pass through