Getting the exact figures requires a lot of effort, so I am going to concentrate in getting the order of magnitude. Also, another factor that makes the effort grow considerably is the various types of meat that are being eaten: beef, pork, broilers, other Chicken, turkey, fish etc.
So, let's consider the beef. This article provides little insight about beef ...
8.06 quintillion liters, or 2.129 quintillion gallons, of water, is used each year for meat worldwide. 30% of Earth's land mass is used for these animals.
How I got There
About 20,029 liters (5,291 gallons) of water is used to produce only one kilogram (2.2 pounds) of meat. After doing some research and math I've come up with the conclusion ...
Generally speaking, it is very hard to make connections between nutrition as a single factor and behavior (source):
One of the more difficult problems in research on diet and behavior is how to separate nutritional from non-nutritional factors. Because
food is so intimately involved with other aspects of our daily lives,
it contains much more than its ...