Bob Marshall / The Lens

The idea that grass can armor anything is hard to believe.

But on a recent visit to the Lake Pontchartrain levee, LSU agronomist Jeff Beasley explained how plain old, garden variety grass has earned a reputation with the US Army Corps of Engineers as one of the best armoring materials to keep the huge mud walls of a levee from collapsing during a storm.

"You know how we reinforce concrete with rebar?" says Beasley. "We can do the same with these levees."