crows cigarette butts A project in Sweden is training to help clean the streets by collecting discarded butts. The system uses a machine that rewards the birds with food when they drop cigarette Clever Crows Are Now Picking

Clever Crows Are Now Picking Up Cigarette Butts And Quietly Saving Millions in Cleaning Costs 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, Sweden uses crows to pick up cigarette butts Crows help to clean up cigarette butts in several countries

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