Guess what? Goats make better lawn mowers than lawn mowers and are a lot cheaper than hiring a landscaping company on a regular basis.

San Francisco Airport hired a herd of 250-300 bovids (goats) to munch the excess weeds, dry shrubs and excess grass along the marshlands on the west side of the airport as part of its fire hazard abatement program.

Airport officials leased the herd from a farm about 80 miles from the airport. Chemicals and heavy machinery were deemed dangerous to the endangered San Francisco garter snake and the California red-legged frog, which also reside on the airport's property.

A herder and an environmental biologist tend to the goats, which apparently are not fazed by the noise of takeoffs and landings.
 

— Gay Nage Myers