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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 Södertälje, near Stockholm. Corvid Cleaning has developed a
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A project in Sweden is training crows to help clean the streets by collecting discarded cigarette butts. The system uses a machine that rewards the birds with food when they drop cigarette
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Wild crows trade cigarette butts for peanuts to keep Swedish streets clean
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Crows help to clean up cigarette butts in several countries
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Crowbars: Vending Machines Reward Crows for Cleaning Up Cigarette Butts
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Six crows were trained to collect the butts thrown on the ground in France. Crows throw the cigarette butts they collect on the street into a machine and buy food from the machine as a reward
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Crows trained to pick up cigarette butts in Sweden
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