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This company builds concrete bubble houses without a single brick. Here's how it works. First, they lay the foundation according to the blueprints. Then, a giant air bladder is inflated, shaping the structure like a massive bubble. Workers spray layers of reinforced concrete over the surface, and in just one day, the shell hardens into a solid home. Once finished, the bladder is deflated and reused, making this one of the fastest and most eco-friendly ways to build on Earth.