Partners in 'slime':
Feds keep buying ammonia-treated ground beef for school lunches
Yes, Jamie Oliver tackled this issue on Food Revolution, but ... you know ... he's British.
Oh, and before you do dive into the article, here is the M-W definition of ammonia. Just as a reminder.
ammonia - a pungent colorless gaseous alkaline compound of nitrogen and hydrogen NH3 that is very soluble in water and can easily be condensed to a liquid by cold and pressure