What exactly is in that ground beef that you're eating?  Apparently, something called "Pink Slime" - and the USDA is okay with it.

The U.S. Department of Agriculture (USDA) defended the use of ammonium-treated beef, dubbed "pink slime" by detractors, in meals destined for U.S. schoolchildren as part of the national school lunch program.

What's interesting is that some fast food chains have eliminated the "Pink Slime" from their hamburgers.

Fast-food chain McDonald's stopped putting the USDA-approved ammonium-treated meat into its hamburgers in August after a number of food activists, including celebrity chef Jamie Oliver, drew attention to the additive.

 

USDA defends ammonium-treated meat dubbed "pink slime" in school meals - chicagotribune.com.