Dirty Diapers Used To Grow Mushrooms
Zothecula writes While their contents might be considered an environmental hazard by many, disposable diapers themselves pose a more significant problem for the environment. According to the EPA, the average baby will work their way through 8,000 of them before they end up in landfill where they'll take centuries to break down. In an effort to reduce the problem, scientists at Mexico's Autonomous Metropolitan University, Azcapotzalco (UAM-A), have turned used diapers to the task of growing mushrooms.
Mushrooms used to be grown on horse manure, and I doubt they are very "selective". So this is no surprise.
However, it is well known to be a bad idea. You do not grow food for human consumption on human feces, because the risk of contamination is too high. Horse manure is ok, as is growing animal fodder on human feces.
And there are better schemes to get rid of old diapers - since they are rich in high quality cellulose that can be used after a good clean.