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Article updated: 7/5/2013 5:19 PM

At this airport, only goats can prevent fires

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In this Wednesday, June 19, 2013, photo, goats graze on a patch of San Francisco International Airport land in San Francisco. San Francisco airport is using 400 goats to clear from an area of the airport prone to fire. (AP Photo/Jeff Chiu)

In this Wednesday, June 19, 2013,photo, a goat grazes on a patch of San Francisco International Airport land in San Francisco.. San Francisco airport is using 400 goats to clear from an area of the airport prone to fire. (AP Photo/Jeff Chiu)

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In this photo taken on Wednesday, June 19, 2013, goats graze on a patch of San Francisco International Airport land in San Francisco. San Francisco airport is using 400 goats to clear from an area of the airport prone to fire. (AP Photo/Jeff Chiu)

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Last month, officials at San Francisco International Airport hired a herd of part-time employees to toil on the west side of the property and engage in an unusual -- but environmentally friendly -- form of fire prevention. Anyone looking down from a plane departing the airport may have wondered, What's with the goats?
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    • In this Wednesday, June 19, 2013, photo, goats graze on a patch of San Francisco International Airport land in San Francisco. San Francisco airport is using 400 goats to clear from an area of the airport prone to fire. (AP Photo/Jeff Chiu)
    • In this Wednesday, June 19, 2013,photo, a goat grazes on a patch of San Francisco International Airport land in San Francisco.. San Francisco airport is using 400 goats to clear from an area of the airport prone to fire. (AP Photo/Jeff Chiu)
    • In this photo taken on Wednesday, June 19, 2013, goats graze on a patch of San Francisco International Airport land in San Francisco. San Francisco airport is using 400 goats to clear from an area of the airport prone to fire. (AP Photo/Jeff Chiu)
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