Americans throw away 25 billion Styrofoam cups every year, and they will not decompose for thousands of years.
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In the lab, 100 mealworms ate between 34 and 39 milligrams of Styrofoam – the weight of a few feathers – per day. The worms converted about half of the Styrofoam into carbon dioxide gas, as they would with any food source, and excreted the rest as biodegraded fragments.
After a month, the Styrofoam-fed mealworms were as healthy as those eating the bran flake diet, said Dr. Wu, and their waste appeared to be safe to use as compost for crops.
There are at least millions of mealworm beetles out there breeding quite successfully.