Here's another problem that may be worse than "Global Warming," assuming it is as bad as predicted:

 

QUOTE:  ...Large-scale livestock operations provide most of the meat and meat products consumed around the world--consumption that is growing at a record pace and is projected to double by 2050, said symposium organizer Harold A. Mooney, professor of biological sciences at Stanford. "We are seeing tremendous environmental problems with these operations, from land degradation and air and water pollution to loss of biodiversity," he said, noting that the developing world is especially vulnerable to the effects of these operations...   UNQUOTE.

 

SOURCE:  http://www.sciencedaily.com/releases/2007/02/070220145244.htm