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CROWS Clean Up City Streets by Collecting Cigarette Butts Recycling Council of Alberta Swedish firm deploys crows to pick up cigarette butts Birds The Guardian When Birds Help Clean The City In Sweden, researchers and innovators have experimented with training wild crows to collect discarded cigarette butts in exchange for food rewards. using simple learning mechanisms, the Butts for nuts: can crows do our dirty work (and should they)? Crows trained to pick up cigarette ends and rubbish at French park Headlines, features, photo and videos from china news chinanews ecns cns

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