Flies are definitely more efficient than humans, since they devote all their time and resources to survival and reproduction. Have you ever seen a fly that gave its life or stopped breeding? Be honest, who would survive a nuclear warfare more likely? Us human or flies? (Well, and flies don't make nukes either)
For some reason, the garbageman reminded me of "Joe the Plumber", who was interviewed by Obama. Anyone know what happened to this guy? Does he still have his plumbing business?