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Wild crows trained to pick up cigarette butts in Swedish street cleaning project
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In parts of Sweden, specially designed machines have been used to train crows to collect discarded cigarette butts and exchange them for food. The system works like a small vending machine: when
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Swedish start-up trains crows to collect cigarette butts | Startup Pedia posted on the topic
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A machine that trades food for litter : r/Amazing
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Sweden startup is teaching crows to clean up cigarette butts after stupid humans
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Crows to help clean up cigarette butts in Sweden
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Trained crows have slashed city cleaning costs by 75%. A Swedish startup named Corvid Cleaning launched
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