These numbers don't really translate to meaningful information.
Livestock eats bulk commodities like corn and grain, which modern mechanized farming has made incredibly efficient. Those staples are grown in regions that don't require irrigation (iowa, kansas, etc). Wheat and corn are already so cheap that they're almost free in the US. Humans get their fill.
It's not like little Johnny can't have broccoli this week because the fat cats are eating burgers.
Look at it from this perspective: Shipping corn and wheat is a relatively efficient way of moving "water" from places that rain a lot to places where it doesn't.
Livestock eats bulk commodities like corn and grain, which modern mechanized farming has made incredibly efficient. Those staples are grown in regions that don't require irrigation (iowa, kansas, etc). Wheat and corn are already so cheap that they're almost free in the US. Humans get their fill.
It's not like little Johnny can't have broccoli this week because the fat cats are eating burgers.
Look at it from this perspective: Shipping corn and wheat is a relatively efficient way of moving "water" from places that rain a lot to places where it doesn't.