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The Swedish startup Corvid Cleaning trains crows to help keep streets clean. The birds collect cigarette butts and other small litter in exchange for food rewards. According to the startup, this system European Royalty, 1908: HRH The Crown Princess Of Sweden stock image Look and Learn A Swedish company has been training crows to pick up cigarette butts in an effort to reduce the cost of cleaning litter off the streets in Sdertlje, near Stockholm., Corvid Cleaning has developed a CROWNS 100'S RED BOX Martin & Snyder Product Sales Issued by W. Duke, Sons & Co. Isabella Everson in Nuptial Costume of Sweden, from the set Actors and Actresses, Second Series (N71) for Duke brand cigarettes The Metropolitan Museum CROWNS MENTHOL GREEN 100 BOX C Store & Novelty Outlet

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