A herd of 25 sheep and goats will maintain the grass at inaccessible areas at Chicago's O'Hare International Airport. This will eliminate the need for herbicides and save on costs, said Rosemarie Andolino, commissioner at the Department of Aviation in Chicago. "We've got some rocky terrain and some embankments that are harsh on our equipment. By putting in the goats, they're able to do the work and provide an eco-friendly way to meet our maintenance needs," Andolino said.

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