Aha .. then there's the mold. Let us not forget the mold. Two
profitable possibilities arise here.

First - maybe the voodoo shops in the 'quarter can make a magic potion
out of it and sell it to the tourists.

Or the local brewers can mix it with something liquid out of the storm
sewers and ferment it and sell it as an intoxicant.

As I recall from living there in 1997, there was putrid glop growing on
walls in New Orleans long before Katrina.

Why all the fuss now ?