crows picking up cigarettes Swedish Company Trains to Pick Cigarette Butts In Sweden, a startup tested

In Sweden, a startup tested a smart but unusual idea: rewarding wild crows with food for picking up cigarette butts. The birds drop the waste into a special machine and receive a Good birdie! This box trains crows to collect cigarette butts for cleaner cities Digital Trends In Sweden, Crows Are Learning to Pick and Dispose of Cigarette Butts Properly The Swaddle Crows trained to clean up cigarette butts on Swedish streets National Crows Could Be Trained To Clear Up Cigarette Butts From The Streets IFLScience Here's A (Crazy?) Plan To Bribe Crows To Clean Up Cigarette Butts Fast Company

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