This is a big con by the Obama administration. They create a rule to ban a hundred year old practice, because it might be unsafe. You would think that after 100 years there would be clear evidence that it is unsafe.
In the meantime it also means beef prices will rise. Which is the real plan, spearheaded by thunder-thighs Michelle. This along with the attack on the Bundy ranch, destroying 100 cows--and denying their meat to the market, a quick BotE calculation shows one cow produces enough meat for a family of four for a couple of years--is a plan not only to deny school kids decent lunches but to prevent their buying burgers after school.
In the meantime, we had a system for recycling waste that was ideal. No machine, no artificial process-- just totally natural, and we tear that up to waste good animal feed.
As I've said before many environmentalists are green only when it's convenient.