These mega-smart crows are cleaning cigarette butts off city
These mega-smart crows are cleaning cigarette butts off city streets — and saving millions of dollars in the process
Cigarette butts alone make up a whopping 62% of all street litter in Sweden.
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Sweden, France, French, Swedish, , Keep Sweden Tidy Foundation, Corvid Cleaning, New Caledonian Crows, Cigarette Butts,