sweden crow cigarette 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 Tidy Foundation, Crows trained to pick up

Crows trained to pick up cigarette butts in Sweden YouTube Crows trained to clean up cigarette butts in Sweden YouTube Watch: Wild crows trained to clear cigarette butts from streets in Stockholm, Sweden In Sweden, a startup tested a machine that rewards crows with food every time they drop cigarette butts into it. The idea sounds unbelievable, but the goal was simple: turn one of

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