crows picking up cigarettes Swedish Company Trains to Clean Cigarette Butts These birds are being recruited

These birds are being recruited to pick up discarded cigarette butts from the streets and squares of a Swedish city as part of a cost cutting drive., The crows carry out the task as they receive some In Sweden, a startup tested a smart but unusual idea: rewarding wild crows with food for picking up cigarette butts. The birds drop the waste into a special machine and receive a Sweden uses crows to pick up cigarette butts Swedish firm deploys crows to pick up cigarette butts Birds The Guardian

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