When the tech industry talks about drones, certain topics tend to dominate. Drones can revolutionize medicine. Drones will advance exploration in space and the deep sea. Drones will reinvent the supply chain. There’s another aspect that doesn’t get as much attention, however: using these unmanned aerial vehicles to do the jobs humans would rather avoid. An example of that comes from Scotland, where modern cities like Edinburgh and Glasgow make do with sewers from the Victorian era – ones dug by
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