Some of my sources...

• Modern Meat

http://www.pbs.org/wgbh/pages/frontline/shows/meat/

• America's Food Crisis and How to Fix It

http://web.ebscohost.com/ehost/detail?sid=58234c5b-0e75-4cb7-a73e-50063436ac46%40sessionmgr13&vid=1&hid=122&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=aph&AN=43886328