Crows are some of the smartest birds in the world, but in Japan, many people don’t like them. They look for food in people’s garbage bags and make a mess in the street. However, one startup company in Sweden thinks that crows can help to keep cities clean. Smokers often throw cigarette butts on the ground, and it’s expensive to pay city workers to pick them up. Crows like to pick up things, so the company has made a special machine. It gives crows a little food when they bring butts to the machine. If you teach one crow, the other crows will learn from it. Crows can help to keep cities clean! Of course, it would be even better if we could teach smokers to stop throwing cigarette butts on the ground!   (133 words)

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