sweden crows pick up cigarettes trained to clean cigarette butts in In Sweden, group of crows

In Sweden, group of crows are trained picking up cigarette butts off the street, cutting clean up costs by up to 75%. 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, A machine that trades food for litter : r Amazing Wild crows collect cigarette butts in Sweden for food rewards Swedish startup Corvid Cleaning built a machine that dispenses food scraps when wild crows drop cigarette butts into a slot. Crows are entirely voluntary participants, drawn in by their problem solving ability researchers

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