Groups Protest Carbon Monoxide Use in Meat:
"Berdahl said Tuesday that carbon monoxide-treated meat could be left on the kitchen counter for five days and would still look bright red and fresh. Carbon monoxide 'also suppresses bad odors and the presence of slime, other telltale signs that meat is spoiled,' Kalsec's petition said.
The petition said treated meat could hide the growth of pathogens such as Clostridium botulinum, Salmonella and E. coli."