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fastcompany:

Knocking down a concrete building usually takes brute force: Wrecking balls, huge excavators, or explosives rip apart walls while fire hoses spray water to keep the clouds of dust down. It’s an energy-intensive process, and after everything’s been torn apart, the concrete often ends up in a landfill or has to be trucked to a recycling facility. But a new concrete-erasing robot may eventually transform the messy business of demolition.

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