A slaughterhouse or abattoir is a facility where animals are killed for consumption as food products.

Approximately 45-50% of the animal can be turned into edible products (meat
Meat is animal flesh that is used as food. Most often, this means the skeletal muscle and associated fat and other tissues, but it may also describe other edible tissues such as organs and offal...

). About 15% is waste, and the remaining 40-45% of the animal is turned into byproducts such as leather, soaps, candles (tallow), and adhesives.
In the United States, around nine billion
Long and short scales
The long and short scales are two of several different large-number naming systems used throughout the world for integer powers of ten. Many countries, including most in continental Europe, use the long scale whereas most English-speaking countries use the short scale...

 animals are slaughtered every year (this includes about 150.4 million cattle, bison, sheep, hogs, and goats and 8.9 billion chickens, turkeys, and ducks) in 5,700 slaughterhouses and processing plants employing 527,000 workers; in 2009, 13450000 long tons (13,665,872.5 MT) of beef were consumed in the U.S.