Llamas, burros and goats to graze at O’Hare once more

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The grass and weeds at Chicago's O'Hare Airport are getting a natural trimming.

Goats, sheep, llamas and burros will graze on the grounds in hilly areas that are difficult to maintain with traditional equipment.

Fences keep them from getting anywhere near runways and airplanes.

The animals were also used at the airport last year.

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