I don't know how they calculated 8,000 nappies per child, they must have had the stinkiest or slowest children on the planet. It's a gross exaggeration. You've got to watch these tree huggers, they 're often rather economical with the truth. It's like the old terry-towelling vs disposable debate. The damage to the environment from HC burning power stations for washing and drying, the chemicals from detergents, and even the labour practices of cotton growers should all be taken into account. The best thing is probably to just make your kid live in a bath for the first year and a bit of its life!

"...they must have had the stinkiest or slowest children on the planet." -"The Master"
I've raised three so far and 8000 sounds like an understatement. My youngest is still in diapers and she goes through at least six a day, sometimes as much as ten. Working the math that's about 3000 a year for full diapers so at least 6000 over the first two years. Then pullup/training pants at about 3 a day for the next year or two 8000 is totally possible.

Farmers are prevented by law, from using human waste, even that which is partially treated, on crop land. For reasons I don't fully understand, pig and cattle manure is ok. On another note: Advertising such a product could be quite interesting. I've already seen "Baby Bella's" on the shelves. Maybe someone's been doing this already!

This idea is on a par with the one about gathering used cigarette filtres, and used, loaded coffee filtres, and there are probably more that I have not seen. Still a genuinely crappy idea. Bon Appetit`.

The Germans used human waste as fertilizer on there fields, and it seems black hair was the norm. I know, lets use animal by product from the meat industry as cattle food.

Maybe they could call them shit-take mushrooms? Yum!

@pickypilot If the answer to why its illegal was to avoid a parasitic life cycle it would totally not surprise me. There are many parasites that attach themselves to the digestive tract and spread through feces and if it were able to attach itself to the nearby mushroom to later be consumed by a human.. well you get the point.
Humans are fortunate that we aren't targeted by more parasites but that's probably not an accident. It's likely though years of careful food and sanitation practices (like making sure human feces and food sources are quarantined from each other) that allow that to be the case.

Diapers, another environment issue.. and hence another business grow.. not sure if they grow better after thunder strike

Looks like they're going to have to start spelling 'shiitake' with one 'i'.
But, seriously. Growing 'shrooms for market in baby poo? Ewwwwwwww! There are reasons 'night-soil' farming is forbidden in the civilized world.

Diapers compose less than 2% of solid waste disposed in the USA. Yard waste and food scraps are 10 times the amount of diapers composing over 20 if the solid waste production.