I just read an article in the NY Times (I’ll spare the URI out of deference to the delicate sensibilities of some forum participants.) about oil companies collecting waste food grease, processing it into regular diesel, identical to the dead-bacteria kind (put it that way, it doesn’t sound so hard). They collect it in the dead of night because there’s less traffic. That reminded me of an article in the LA Times years ago about the Mob taking over the used grease business. Companies process it so it can be used again (think about that over your next french fry). The fast food joints have large tanks out back. They weren’t locked up; anybody could take it, so the Mob moved in.
That reminds me of the time newsprint got so expensive people (not the Mob, just amateurs) followed around the trucks that delivered the free papers, took the whole stack for recycling. The LA city council passed an ordinance limiting it to 2.