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.

The airport paid $14,900 for the service this year.

Anyone looking down from a plane departing the airport may have wondered, What's with the goats?

For two weeks in June, Mr. Fuzzy, Cookie, Mable, Alice and nearly 400 other goats chomped on the brush in a remote corner of the airport. The area needs to be cleared each spring to protect nearby homes from potential fires. But machines or humans can't be used because two endangered species - the San Francisco garter snake and the California red-legged frog - live there.

http://www.usatoday.com/story/todayinthesky/2013/07/06/san-francisco-airport-hires-herd-of-goats-for-fire-prevention/2493899/

makes sense to me. . .

natural alternative