California's ignoring the elephant in the room when it comes to water usage - or rather, the cow.

Last week Gov. Jerry Brown issued an executive order in response to the state's years-long drought, and now, all urban water users will have to reduce their usage by 25 percent. Unfortunately, this plan exempts the biggest water users in the state: Big Ag.

Everyone knows factory farming is bad for animals. But here's a by-the-numbers look at why it's bad for California's drought, too.

About 80 percent of California's water goes to agriculture.

Brown's plan to cut water usage will affect the individuals, businesses and small farmers who use only 20 percent of the state's water. Large-scale farmers - who use 80 percent of the water in the state - are largely untouched.