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The New York TimesMother Nature is not like typical moms who tell their kids to clean up their messes. Mother Nature makes messes, and big ones.
So long after the natural disasters — whether floods, fires, hurricanes, earthquakes or tornadoes — and even after people find a place to stay once their homes have been destroyed, somebody still has to take out the trash.
And there’s a tremendous amount of the stuff. In Alabama and Missouri, residents are still digging out from this year’s tragic swarm of tornadoes. The Army Corps of Engineers estimates that the debris it has picked up in Alabama is enough to cover 172 miles of a 24-foot-wide highway to a depth of six feet, a thoroughfare of detritus that would stretch from New York City to Harrisburg, Pa.
So many trees and other vegetative matter have piled up that enormous grinders (brand name: HogZzilla ) are used to chew the waste into smaller chunks so that it takes up less room in landfills.
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http://www.nytimes.com/2011/08/05/us/05debris.html