A trash bin in the corner, in which plenty of human leftovers can be found, provides great opportunities for ants, flies and cockroaches to share food with us.
But in the near future, environment and climate changes will worsen existing food supply problems. Half the world's population will face severe food shortages.
Till then, nobody can afford to waste even a bread crumb. Looking in vain for food, ants, flies and roaches will begin to gnaw empty tableware.