sweden crows cigarettes A project in is training to help clean the streets by collecting discarded cigarette butts. The system uses a machine that rewards the birds with food when they drop cigarette A Swedish start-up, Corvid Cleaning,

A Swedish start up, Corvid Cleaning, is recruiting an unlikely workforce, wild crows, to combat urban pollution., The pilot project, launched in partnership with the Keep Sweden Tidy Foundation, Watch: Wild crows trained to clear cigarette butts from streets in Stockholm, Sweden Swedish firm deploys crows to pick up cigarette butts Birds The Guardian A machine that trades food for litter : r Amazing Wild crows trade cigarette butts for peanuts to keep Swedish streets clean National Post Wild crows trained to pick up cigarette butts in Swedish street cleaning project

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